Eliminate the concept of 'Recipients' (plural). There is now just
a 'Recipient', which contains an Address that is either an individual
or a group ID.
MMS groups now exist as part of the group database, just like push
groups.
// FREEBIE
This was a holdover from Signal's origins as a pure SMS app.
It causes problems, depends on undefined device specific behavior,
and should no longer be necessary now that we have all the
information we need to E164 all numbers.
// FREEBIE
1) orientation changes are now properly handled
2) emoji panel will not overrun the actionbar and composition area
in space-contentious situations (quick reply popup)
Closes#3553fixes#3501fixes#3485fixes#3199
// FREEBIE
