Currently, we are able to establish Focus on an Element within a hierarchy by default by pressing the ArrowKeys in any direction whilst Focusable Elements are present on-Stage.

However, it appears that once Focus has been established in a Page being played, Focus cannot not be removed during the playthrough.

See attached video.

Repro Steps:

1) Download, unzip, and open the attached 'RemoveFocusAction' Project in Studio, and opening MainPage.xaml.

2) Identify Button_A3 (bottom left of the grid of Buttons).

3) In the Triggers Panel, identify the KeyTrigger applied to this Button, and inspect the Trigger's Properties.
Observe how in theory, whilst Button_A3 is focused, pressing the 'Q' key should change its 'Focusable' Property to 'Disabled' (not focused).

4) Play the Page, and use the arrowkeys to set the Focus on Button_A3 in the lower-left corner.

5) With Button_A3 still focused, press 'Q' on the Keyboard.
Observe how the Button persists as 'Focused'.

6) Exit Play Mode, select Button_A3, and manually uncheck its 'Focusable Property', then Play the Page again.

7) Whilst in 'Play Mode' use the Arrow keys to navigate around the Grid.
Observe how Button_A3 is correctly being excluded from Focus.

Expected Results: Changing a Focused Element's 'Focusable' Property to 'Unfocused', removes Focus from it during playback.