Currently, if you happen to press [Tab] whilst the Zoom Level input box is selected, a hidden XAML View will open.

Repro Steps:

1) Open any Studio Project
2) In the upper-right of the application window, in the Toolbar, click once on the number displayed in the 'Zoom' input field. This will highlight the number in a semi-transparent blue strip.
3) Without clicking anywhere else, or pressing any other keys, press [Tab].

Observe how a hidden XAML View has been opened that can't be exited.

Expected Results: Pressing [Tab] from the last item in the Toolbar should serve as a "loop" and return it to the first Tabbable item in the array (if I'm not mistaken, I believe this means tabbing to the first interactive item of the top-left Function Panels (Assets, Add Element, etc...)