Overlay sometimes takes focus resulting in a Black Screen glitch on Windows 10

[danieloneill]

Although unconfirmed on other platforms, it seems the Overlay will sometimes have focus. Although it isn't explicitly requesting it, it's possible some anti-focus flags aren't being set correctly, or the desktop is implicitly giving TwitchOverlay focus.

The result is the overlay otherwise working normally but on a plain black background.

Clicking anywhere on the screen, Alt+Tab, or some other way of selecting a focus application seems to work around the issue and resumes normal operation.