Fullscreen mode leaves out a fully transparent bar at the bottom in Windows 10

### Describe the bug
When I use fullscreen mode with manimGL v1.6.1 on Windows 10 there is an empty bar at the bottom of the screen through which I can see whatever is behind the python fullscreen drawing area (i.e. it's not actually fullscreen). That is, if I have a browser open I can see the browser through the bottom bar, or if I have only the desktop, I can see it.

**Code**:
Any example in fullscreen, e.g. from the example_scenes.py.

**Wrong display or Error traceback**:

### Additional context
### Environment
**OS System**: Windows 10
**manim version**: master MagnimGL v1.6.1
**python version**: Python 3.9.6