help: Add tabbed notes and links for previous mobile features.

For mobile features that were documented and implemented for the legacy
React Native app, adds back a tabbed block for mobile with a note to
use the web app instructions in a mobile device browser, and with a
link to the Flutter GitHub issues tracking implementing the feature in
the new mobile app.

If the feature is a mobile only feature, then adds the link to the
Flutter GitHub issue in a warning note.

help/change-the-channel-description.md

@@ -29,6 +29,16 @@ disabled. Use Markdown formatting to include a link to a website, Zulip
 
 {!channel-settings-general-tab-tip.md!}
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1102). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 {!automated-notice-channel-event.md!}

help/change-the-privacy-of-a-channel.md

@@ -30,6 +30,16 @@ web-public if they have content access to it:
 
 {!channel-settings-general-tab-tip.md!}
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1102). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 {!automated-notice-channel-event.md!}

help/change-your-language.md

@@ -19,6 +19,16 @@ messages you receive.
 
 1. Click **Reload**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1139). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Font configuration for unsupported languages

help/channel-notifications.md

@@ -22,6 +22,16 @@ channels](/help/mute-a-channel), channel notification settings apply only to
 1. Under **Notification settings**, toggle your preferred
    notifications settings for the channel.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1223). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Configure default notifications for all channels
@@ -38,6 +48,16 @@ explicitly set a notification preference.
 1. In the **Notification triggers** table,
    toggle the settings for **Channels**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/661). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Related articles

help/delete-a-topic.md

@@ -30,6 +30,16 @@ whereas [archiving a channel](/help/archive-a-channel) does not.
 
 1. Approve by clicking **Confirm**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1549). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 Note that deleting all of the individual messages within a particular

help/emoji-reactions.md

@@ -90,6 +90,16 @@ so](#toggle-whether-names-of-reacting-users-are-displayed) is enabled.
 
 1. Hover over an emoji reaction to see who reacted with that emoji.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/740). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ### Toggle whether names of reacting users are displayed

help/include/create-a-channel-instructions.md

@@ -21,4 +21,14 @@
     **Note**: You will only see the **Create channel** button if you have
     permission to create channels.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1572). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}

help/introduction-to-channels.md

@@ -30,6 +30,16 @@ subscribe to [private](/help/channel-permissions#private-channels) channels.
     **by number of subscribers** (<i class="fa fa-user-o"></i>), or
     **by estimated weekly traffic** (<i class="fa fa-bar-chart"></i>).
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/188). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Related articles

help/link-to-a-message-or-conversation.md

@@ -149,6 +149,16 @@ formatted for you. You can paste as plain text if you prefer with
     If using Zulip in a browser, you can also click on a topic name,
     and copy the URL from your browser's address bar.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/792). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ### Get a link to a specific channel
@@ -161,6 +171,16 @@ formatted for you. You can paste as plain text if you prefer with
 
 1. Click **Copy link to channel**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1227). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Related articles

help/mute-a-channel.md

@@ -12,6 +12,16 @@
 
 1. Click **Mute channel**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/347). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Unmute a channel
@@ -24,6 +34,16 @@
 
 1. Click **Unmute channel**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/347). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Alternate method to mute or unmute a channel

help/pin-a-channel.md

@@ -14,6 +14,16 @@ which is especially handy if you are subscribed to a large number of channels.
 
 1. Click **Pin channel to top**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1223). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Unpin a channel
@@ -26,6 +36,16 @@ which is especially handy if you are subscribed to a large number of channels.
 
 1. Click **Unpin channel from top**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1223). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Alternate method to pin or unpin a channel

help/read-receipts.md

@@ -29,6 +29,16 @@ their organization.
     You can also use <kbd>Shift</kbd> + <kbd>V</kbd> to show or hide read receipts
     for the selected message.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/667). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 !!! tip ""

help/rename-a-channel.md

@@ -20,6 +20,16 @@ and Unicode emoji.
 
 {!channel-settings-general-tab-tip.md!}
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1102). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 {!automated-notice-channel-event.md!}

help/share-and-upload-files.md

@@ -75,6 +75,14 @@ preview to [view the full-size image or video](/help/view-images-and-videos).
 
 1. _(optional)_ Modify the link text as desired.
 
+!!! warn ""
+
+    Implementation of sharing files from other applications in the
+    mobile app is tracked [on
+    GitHub](https://github.com/zulip/zulip-flutter/issues/52). If
+    you're interested in this feature, please react to the issue's
+    description with 👍.
+
 {end_tabs}
 
 !!! tip ""

help/start-a-call.md

@@ -31,6 +31,16 @@ administrators.
     You can replace the "Join video call." label for the link with any text you
     like.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1000). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Start a voice call

help/status-and-availability.md

@@ -32,6 +32,16 @@ You can set a status emoji, status message, or both.
 
 {!set-status.md!}
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/198). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ### Clear a status
@@ -72,6 +82,16 @@ and compose box. Status emoji and status messages are also shown on
     sent to view their status in their **user card**, or configure status text
     to always be shown in the right sidebar.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/197). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ### Configure how statuses are displayed
@@ -168,6 +188,16 @@ Your activity will still be included in your organization's [statistics](/help/a
     You can also toggle this setting in the **Account & privacy**
     tab of your **Personal settings** menu.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1578). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Related articles

help/subscribe-users-to-a-channel.md

@@ -33,6 +33,16 @@ You will only see the options below if you have the required permissions.
       To subscribe users in bulk, you can copy members from an
       existing channel or [user group](/help/user-groups).
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1222). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 {!automated-dm-channel-subscription.md!}

help/unsubscribe-from-a-channel.md

@@ -10,6 +10,16 @@ You can always unsubscribe from any channel in Zulip.
 
 1. Click **Unsubscribe**.
 
+{tab|mobile}
+
+Access this feature by following the web app instructions in your
+mobile device browser.
+
+Implementation of this feature in the mobile app is tracked [on
+GitHub](https://github.com/zulip/zulip-flutter/issues/1224). If
+you're interested in this feature, please react to the issue's
+description with 👍.
+
 {end_tabs}
 
 ## Alternate methods to unsubscribe from a channel