- Don't ever swap to the ellipsis menu with the close icon button; we
now always have it
- Promote the "focus the last workspace" feature through the ellipsis
menu
- Add a unified tooltip for the thread item to show relevant thread
metadata
- Use a different icon for accessing the now "all threads" view
- Simplifies how we display archived threads
- Bonus: Don't display the "open in new window" button in currently
active worktrees (in dedicated picker)
- Bonus: Use the "main worktree" label for whenever we're mentioning the
original worktree

Release Notes:

- N/A