New experience in the Message Detail view when outgoing identity key
errors happen, matching the Android View.
'View' button is only shown on outgoing key errors right now.
When a contact with an outgoing identity key error is clicked, they are
taken to a view like the popup that comes up on Android: an explanation
of what happened and three options: 'Show Safety Number', 'Send Anyway',
and 'Cancel'
Contacts are now sorted alphabetically, with the set of contacts with
errors coming before the rest.
FREEBIE
