Make all UI components reflect correct briar state
Many things in the UI are just stubs not displaying the state they are meant to represent. This is an epic umbrella ticket to gather such issues.
Examples for things that don't reflect state yet:
- online status of contacts in contact list
- online status of contact in private message view top bar
- avatar images in contact list
- avatar image in private message top bar
- timestamps in message bubbles
- delivered/read-checkmarks in message bubbles
- last seen time in contact list
We probably want tickets for individual things like those and link them with this ticket.