Fixes zulip#19759
Before grid, there was overlap of action buttons and text (photo 1).
With grid, there was just very little space for messages (photo 2).
With this commit, the message gets a bit more space (photo 3).
This helps us add more width to the content column of message
on narrow widths. Note that it will still always be less than
before grid, since we are explicitly preventing overlap.
This commit removes get_editability function and we can instead
use is_content_editable and is_topic_editable/can_move_message
functions to check the permissions. We can remove get_editability
since there is no longer a sort order to the possibilities and
it is not necessary that if a user has permission to edit content
then they can edit the topics also.
So, this commit adds is_message_editable_ignoring_permissions
check to is_content_editable and also modifies the tests accordingly.
This commit changes the topic edit permssions in webapp to not depend
whether the user editing the message had sent the message or it was sent
by someone else. Backend changes were done already in previous commits.
Previously, we always allowed topic edits when the user themseleves had
sent the message not considering the edit_topic_policy and the 3-day time
limit. But now we consider all messages as same and editing is allowed only
according to edit_topic_policy setting and the time limit of 3 days in
addition for users who are not admins or moderators.
Since we are switching to tippyjs to display popovers, extracting
this data in a commit of its own, makes further changes easier to
review and merge.
Also, we could add tests with full coverage on the data
provided to popovers, possibly a good first issue for beginners.