Inhibit hardware cursor on screen casted monitors
From the commit message:
The screen cast depends on the frame being read by glReadPixels(). When
hardware cursors are used, this will result in the cursor sprite not
being included in the screen cast frames. To fix this, disable hardware
cursors for monitors being screen casted.
Eventually we can add "cursor sprite" support to PipeWire, but until we have that, lets be consistent.