Displays a notification above the composebox in cases where the message
is not visible (further down), or where it's outside the current narrow or search.
It also offers a link to the appropriate narrow when it makes sense, and offers
timetravel when appropriate. There is currently a bug with timetravel (and you can
see this when using the popover menu) that makes "narrow to messages around this time"
not work for muted messages.
This resolves Trac #1518.
(imported from commit 391ca0b9c07d91496f6585a4fd8e15723d1170e2)
This needs to be deployed to both staging and prod at the same
off-peak time (and the schema migration run).
At the time it is deployed, we need to make a few changes directly in
the database:
(1) UPDATE django_content_type set app_label='zerver' where app_label='zephyr';
(2) UPDATE south_migrationhistory set app_name='zerver' where app_name='zephyr';
(imported from commit eb3fd719571740189514ef0b884738cb30df1320)
acrefoot
Leo Franchi
Allen Rabinovich
Waseem Daher
Tim Abbott