Release for Tab automatically fires after adding a focusable widget to the viewport and setting the input mode to UI

The release execution for the tab key fires even though the tab key is still held down. This makes it so that the Release will sometimes fire twice (once while held down and another when the key is released). This happens if a focusable widget is added to the screen and the input mode is set to focus on UI.

1. Open the editor
2. Create a new widget blueprint
3. Add a button to the designer tab
4. Save and compile
5. Open the level blueprint
6. Create the blueprint in the attached image
7. Play in editor
8. Press and hold the tab key
9. Notice that both print strings fire off even though the Tab key has not been released

Expected: The release execution would not fire off unless the key has been released
Result: The release execution for the tab key fires even though the tab key is still held down. This makes it so that the Release will sometimes fire twice (once while held down and another when the key is released)