- No more translatable, content_type, show_name_line attrs for
TimelineEventReceived.
Since they are UI concerns, they are handled directly in QML.
- Refactor the EventDelegate and get rid of errors when new items
are added to the timeline
- Messages, events and emotes all combine correctly.
- No more 28px wide avatars for events, to make them uniform with
messages.
Avatar and name won't be shown for our messages
(the avatar is still visible in sendbox), but they will have a different
background color.
Also make bottom UI elements 36px tall, for avatars to match size with
the rest of the UI.
