This commit removes the "Remove" and "Unsubscribe" action buttons from
various tables and replaces them with icon buttons using the "close"
icon.
Additionally, previously the rows with and without a remove button had
different heights. This commit updates the fixed `px` values to `em`
units to ensure equal height for all rows, regardless of whether a
remove-subscription button is present.
Fixes: #34874.
Renames file and redirects existing links to "help/user-roles" as
the previous content tracks to that current file's content.
Updates existing links (excluding ReadtheDocs) to go to either
"help/user-roles" or "help/manage-permissions" depending on which
help center article applies to the content.
Earlier we use to restrict admins, moderators or members of a group to
manage that group if they were part of the realm wide
`can_manage_all_groups`. We will not do that anymore and even
non-members of a group regardless of role can manage a group if they are
part of `can_manage_all_groups`.
See
https://chat.zulip.org/#narrow/stream/101-design/topic/Group.20add.20members.20dropdown/near/1952902
to check more about the migration plan for which this is the last step.
In the help center and production documentation, replace links to
the "Getting your organization started with Zulip" guide to the
new "Moving to Zulip" guide.
