Indicate Here/Away presence when viewing query/PM
Quasseldroid should show some sort of "Here/Away" presence indication when viewing a query/private message. This would make it easier to tell if the person you're talking to has gone away in the middle of writing a long message, etc.
- A green circle/yellow triangle/gray X/whatever somewhere near the buffer name
- Mimics Quassel desktop
- Should follow Material design/icons
- Italicize the buffer name for users that are away
- Might be easier and more obvious, but might not look nice - not sure
- Something else..?