Non-fullscreen overlay incorrectly displayed on tablets

[TomasKypta]

The non-fullscreen overlay keeps status bar space on top of the screen even on tablets, that have no top status bar. The fullscreen version covers this space.
Neither version can cover the bottom status bar, but that's not a problem since it can't be done.
On tablets the fullscreen/non-fullscreen distinction is irrelevant. It would be better to completely disable the checkbox in settings.