help: Use tooltip text for plus and checkmark icon descriptions.

help/general-chat-topic.md

@@ -21,8 +21,8 @@ topic, or follow the instructions below.
 
 {tab|via-left-sidebar}
 
-1. Click the **plus** (<i class="zulip-icon zulip-icon-square-plus"></i>) button next
-   to the name of the channel where you'd like to send a message.
+1. Click the **new topic** (<i class="zulip-icon zulip-icon-square-plus"></i>)
+   button next to the name of the channel where you'd like to send a message.
 
 {!compose-and-send-message.md!}
 

help/include/send-dm.md

@@ -2,7 +2,7 @@
 
 {tab|desktop-web}
 
-1. Click the **plus** (<i class="zulip-icon zulip-icon-square-plus"></i>)
+1. Click the **new direct message** (<i class="zulip-icon zulip-icon-square-plus"></i>)
    button next to the **direct messages** heading in the left sidebar, or
    the **New direct message** button at the bottom of the app.
 

help/include/start-topic-via-left-sidebar.md

@@ -1,5 +1,5 @@
-1. Click the **plus** (<i class="zulip-icon zulip-icon-square-plus"></i>) button next
-   to the name of the channel where you'd like to start a conversation.
+1. Click the **new topic** (<i class="zulip-icon zulip-icon-square-plus"></i>) button
+   next to the name of the channel where you'd like to start a conversation.
 
 1. Enter a topic name. Think about finishing the sentence: “Hey, can we chat about… ?”
 

help/introduction-to-channels.md

@@ -19,7 +19,7 @@ subscribe to [private](/help/channel-permissions#private-channels) channels.
 1. Scroll through the list of channels. You can use the **search box** near the
    top of the menu to filter the list by channel name or description.
 
-1. Click the **plus**
+1. Click the **subscribe to channel**
    (<img src="/static/images/help/desktop-web-plus-icon.svg" alt="plus" class="help-center-icon"/>)
    icon to the left of a channel to subscribe to it.
 

help/left-sidebar.md

@@ -113,7 +113,7 @@ you’re currently viewing.
 
 {tab|desktop-web}
 
-1. Click the **plus** (<i class="zulip-icon zulip-icon-square-plus"></i>)
+1. Click the **new direct message** (<i class="zulip-icon zulip-icon-square-plus"></i>)
    button next to the **direct messages** heading in the left sidebar.
 
 1. Start typing the name of the person or [group](/help/user-groups) you want to

help/logging-in.md

@@ -83,7 +83,7 @@ Here are some ways to find the URL for your Zulip organization.
     [proxy settings](/help/connect-through-a-proxy) or add a
     [custom certificate](/help/custom-certificates).
 
-1. Click the **plus** (<i class="fa fa-plus"></i>) icon in the
+1. Click the **add organization** (<i class="fa fa-plus"></i>) icon in the
    **organizations sidebar** on the left. You can also select **Add Organization**
    from the **Zulip** menu in the top menu bar.
 

help/resolve-a-topic.md

@@ -52,7 +52,7 @@ topics](/help/restrict-moving-messages).
 
 !!! tip ""
 
-    You can also click on the **checkmark** (<i class="zulip-icon zulip-icon-check"></i>)
+    You can also click on the **mark as resolved** (<i class="zulip-icon zulip-icon-check"></i>)
     icon in the message recipient bar to mark an unresolved topic as resolved.
 
 {tab|mobile}

help/unsubscribe-from-a-channel.md

@@ -32,7 +32,7 @@ description with 👍.
 
 {relative|gear|channel-settings}
 
-1. Click the **checkmark**
+1. Click the **unsubscribe from channel**
    (<img src="/static/images/help/desktop-web-check-icon.svg" alt="checkmark" class="help-center-icon"/>)
    icon to the left of a channel to unsubscribe from it.
 

help/user-groups.md

@@ -20,7 +20,7 @@ organization's structure in Zulip's permissions system.
 1. Scroll through the list of user groups. You can use the **search box** near
    the top of the menu to filter the list by group name or description.
 
-1. Click the **plus** (<img src="/static/images/help/desktop-web-plus-icon.svg"
+1. Click the **join group** (<img src="/static/images/help/desktop-web-plus-icon.svg"
    alt="plus" class="help-center-icon"/>) icon to the left of a user group to
    join the group, if you have
    [permission](/help/manage-user-groups#configure-group-permissions) to do so.
@@ -35,7 +35,7 @@ organization's structure in Zulip's permissions system.
 
 {relative|gear|group-settings}
 
-1. Click the **checkmark** (<img
+1. Click the **leave group** (<img
    src="/static/images/help/desktop-web-check-icon.svg" alt="checkmark"
    class="help-center-icon"/>) icon to the left of a user group to leave the
    group, if you have