recent_projects: Add some UI improvements (#54629)

- Adds a "Current Folders" header for the multi-root group
- Improves the project/branch truncation and active checkmark
positioning for project list item
- Add folder-type icons for the list items within the "This Window"
group
- Refine lanaguage in buttons and tooltips so they're more consistent

<img width="400" alt="Screenshot 2026-04-23 at 6  23@2x"
src="https://github.com/user-attachments/assets/02131a6c-0956-46bb-8def-af57df5b0b9e"
/>

Release Notes:

- N/A
3eb0bab077Danilo Leal committed on 4/23/2026, 3:12:32 PM· committed by GitHubparent052184e
1 file changedLine totals unavailable