Signup enhancements.

- Remove unused segue
- Add call to super
Archive/Inbox: Unread layout and other enhancements

- Add lastAction indicator for errors and info in TSThreadViews
- Enable unarchiving and deletion from archive.
- Unread message layout
Messages view fixes

- Delivered tag
- Fix tap to resend recognizer
- Error messages layout

Reviewed-by: @FredericJacobs
Fixing crash in MessagesViewController.
Bug fixes in MessageViewController

- Messages shouldn’t be marked as seen if app in background
- Fixes crash on first delivery receipt
Error handling messages and Info Messages
Support for MITM/key change interface.
Identity Key QR verification

• this plumbs in the QR verification for iOS, both scanning contact and having your fingerprint scanned.

Reviewed-by: @FredericJacobs
Bugfix: Fixing ordering for compose view.

Reviewed-by: @FredericJacobs
Debug: Logging new password creation.
Bugfix: Fixes crash on multiple update.
Removing keyboard when proposing new fingerprint.
conflict fix