Pause "always on top" when debugging

[timothyqiu]

Setting "always on top" is handy when using the remote scene tree and live editing.

But when error occurs, the game window is useless and "always on top" makes it hard to see debugger/editor content.

I suggest pausing "always on top" for the game window when the debugger pauses the game (for a breakpoint or for a script error, etc).