Draft: xfree86/modes: Use per-screen monitor for all outputs by default
Patch to implement the desired behavior (see issue #1140).
If there is interest in this MR, I'll follow up with the drivers. Indeed, at least 'xf86-video-intel' may need to also be updated accordingly (see 'src/sna/sna_display.c', function 'sna_output_add', call to 'xf86OutputUseScreenMonitor'). Have not checked drivers besides 'xf86-video-intel', 'xf86-video-amdgpu', 'xf86-video-nouveau', 'xf86-video-nv' and 'xf86-video-vesa' at this point.