Added back round corners to main lists in portrait mode (keep round top bar in landscape) + increased space at the bottom of the avatar in top main bar

Fixed issue with top margin, specifically visible when in landscape + reduced spaced in drawer layout for phones in landscape

Wait for adapter to contain data before attaching it to recyclerview to prevent loosing scroll position when rotating device

Use .mka extension instead of .mkv for voice recordings, use .smff instead of mkv for call recordings

Prevent crash due to calling chatRoom.getLocalAddress() when it's in Instanciated state (because returned value is null)

Should prevent 'no network' alert over orange background (instead of red) in main activity due to race condition

Adding back 'hide empty chat rooms' setting, was disabled at some point during 6.0 dev but should be enabled back

Fixed text message description not being italic for some parts + improved description: added duration to voice message & replaced file name by image emoji for pictures