* Add support for contacts with more than one Signal account using ContactAccount class.
* Use OWSTableViewController in contact-related views.
* Let users add non-contacts to groups.
* Improve the "new group" and "edit group" views.
* Add utility methods for displaying alerts.
* Warn users before discarding unsaved changes in "edit group" view.
* Pull out "contact view helper" to de-duplicate common logic among contact-related views.
* Pull out "group view helper" to de-duplicate common logic among group-related views.
* Pull out new base class for view used to add accounts to groups or the block list.
// FREEBIE
* Fix two bugs around play/pause button appearance.
* Fix bugs around stopping playback when leaving view/entering background.
* Fix bugs around cleaning up playback state when leaving view/entering background.
* Fix audio playback vs. hardware mute button.
* Improve handling of invalid audio attachments.
// FREEBIE
Replace previous "scary" warning-style attachment notifications with
something less alarming.
Includes file name and file type emoji when discernable.
// FREEBIE
* use page view controller
* UIPageControl instead of arrows for idiomatic swiping
* Nudge title lower
* better hit area for dismiss
* use darker blue for text
* Open privacy settings from callkit update screen
* tweak copy
* latest translations
// FREEBIE
Distinguish between localHangup, remoteHangup, and call failure.
This allows us to put CallKit in the proper state, ready to receive new
calls without having a backlog of phantom calls which haven't been
properly removed.
Note the "call error" occurs at the point ICE fails, which takes a
while. Anecdotally, like 10 seconds, which feels like a long to be
talking into the ether.
I briefly considered failing at 'disconnected', which happens much
sooner, but that's actually a recoverable state. E.g. if you toggle
airplane mode you can see that you bounce into `disconnected` and then
back to `connected`, so I don't think we'd want to fail the call as long
as WebRTC considers it "recoverable".
// FREEBIE
...in response to CR, move the AudioService off of the CallViewController
Adopt multiple observer pattern vs. a singular delegate. Doing so
required implementing some machinery to address the ARC (see:
Weak.swift)
// FREEBIE
