Source chooser popover revamp
The layout of the source chooser popover is pretty awkward currently, here's an attempt at cleaning it up:
The colors here would just be hardcoded for specific strings, (since there's not that many different strings in practice), and fall back to neutral gray.
Some open questions:
- Do we want to keep it in the headerbar or move it into the view? I tried a few things for the latter but didn't come up with anything I like yet. Perhaps we can redo just the popover content for now and revisit the placement separately. — Placement being handled in #1585 (closed)
- Does it make more sense to split user and system into separate groups or have a tag for that?
Edited by Philip Withnall