WIP UI Tweaks (#2911)

- Tighten up toolbar
- Reduce intensity of active tools
- Remove divider between project + branch
- Add a styletree for toolbar + move breadcrumb into it
- Some ts theme tidying

[[PR Description]]

Release Notes:

- Improved density and contrast of a number of UI elements.
e808386765Nate Butler committed on 8/30/2023, 3:19:05 PM· committed by GitHubparentsea17d161da3be0
40 files changedLine totals unavailable