Projects - add "lock membership", which prevents people from leaving
Fixes T5603. Puts the toggling of locking membership into the editor so we get exceptions and all that.
I think the dialogue when you try to leave a project that is locked could be a little better maybe? Right now it just says "You can't leave" and "The membership is locked" more or less; should I surface a link to the policy stuff there too?
- made a project, toggled the "lock" setting, observed stickiness and good transactions being made
- locked a project and tried to leave as a non-editor - got a dialogue letting me know i couldn't
- locked a project and tried to leave as an editor - left successfully
Reviewed By: epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T5603
Differential Revision: https://secure.phabricator.com/D10508