Retool Django State/Commands

[x] Remove breakouts_transfer variable from meetings.mode
[ ] Change meetings.views.freeze call to take in a true/false argument
[x] Add a boolean and command for opening manual modal, make it set freeze
[x] Change create call command to also freeze
[x] Add a command for returning to breakout session, close modals and unfreeze, discard call
[x] Atomize the calls of these commands in frontend.components.meetings

mitmedialab / unbreakout