* Calls: Play dial and busy tones on speaker during video calls
* Calls: Offer to record voice message when callee is busy
* Calls: Add 'Return to chat' to audio call screen
* Calls: Fixed some compatibility and stability issues
* Calls: Show help button if call fails
* Calls: Reduce echo during calls on some devices
* File sharing: Handle GPX files
* Search: Add ability to search within conversations
* Notifications: Show notification if message delivery fails
* Notifications: Fixed notifications not showing up under certain conditions
* Tor: Add button to start Orbot from notification if necessary
* Backup/restore: Improve performance for backup restore
* Usability: Improve keyboard shortcuts
* Account: Fix login when passwords contains special characters
* Many other bug fixes and stability improvements!
