multiple UX enhancements added from April 3rd '26 backlog

[markrai]

items completed:

1. When the search box is focused, the ESC key should remove focus.
2. The text in Settings -> Sprints: Rename "below" to "above."
3. When in settings the TAB key should toggle between the tabs
4. When on the dashboard tab, the project tab count can erroneously display zero count for projects (intermittently)
5. SHIFT + TAB should toggle in reverse