group visual fixes

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Merge pull request #2276 from mcginty/group-meta-colors

group visual fixes
Fix for old-skool SMS key exchange UI behavior.

Also fixes SMS "end session" messages failing to end session.

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Bitmap OOM and rotation fixes

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media preview orientation

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Updated language translations

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Remove empty strings.

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Basic support for feature 520
Revert "temporarily disable encrypted backup"

This reverts commit 5121ab0eed935e24a7c2617d5df12fd92b6115e8.

fix translations
always enable emojii for me
character counting when sms fallback is disabled but direct sms enabled
Save drafts for recipients without an existing thread

- Prevent drafts without thread in database
- Clear drafts when deleting conversation(s), otherwise
  the drafts stay in the database and will reappear when a thread
  with the same threadId is created
- create separate SaveDraftTask class