Allow arrow keys to be used in tab switcher (#10396)

In addition to `ctrl-tab` and `ctrl-shift-tab`, VS Code allows changing
the selection in the tab switcher via the up and down arrow keys.

Release Notes:

- Added bindings to allow `up` and `down` arrow keys to be used while
the tab switcher is open.
859c5279c4Joseph T. Lyons committed on 4/11/2024, 4:11:48 AM· committed by GitHubparent13c14d9
2 files changedLine totals unavailable