option to center the application menu in the middle of the screen

### Problem

The application-menu is fine on small or normal sized screens, but on big or ultra-wide screens it is very unconfortable to always jank your focus to the top right of the screen.

### Proposal

It would therefore be very nice (if within the design vision), to be able to optionally place it in the center of the screen.
The "centered mode" could be introduced as a third view, next to "View as Grid" and "View by Category"

I think the design would need to be tweaked to be not as tall in that mode.

### Prior Art (Optional)

Here's a little mock up of how it could somewhat look: