* Down arrow focuses list view.

* Scoping

* Generalize focusFirstIfNothingFocused logic to all list views

* Revert "Generalize focusFirstIfNothingFocused logic to all list views"

This reverts commit 2bdfeef828c9b427c0897769ec45f315e19bbb65.

* Generalize to list in debug view

* Add to dispasables

* Same for scmViewlet

* Default 'list.inactiveFocusBackground' to null

* Migrate from `onDidFocus` to `onDidChange` where possible

* Remove changes for non-extensions

* Undo changed to color registry

* Move focus next position