Users were getting confused about why the unread count in the sidebar
/ notification bar / Dock was different from what the bankruptcy modal
said, so only show them the true server count until they've made a
decision.
(imported from commit 71d376cd4a85749ccf49936b251e6b8ac21361b7)
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)