We no longer show the 'default' visibility policy in
the inbox view. 'Unmute', 'Follow', and "Mute' are
still shown.
For topics with 'default' visibility policy, it is
still possible to change the visibility policy via the
three-dot menu.
The motivation is not to have the default state so
prominently called out.
This commit removes the 'development' guard and makes
the UI changes related to the 'Follow Topics' project visible
outside the development environment.
Cleans up the older UI elements related to mute and unmute topics.