[Feature] Add a fullscreen command line switch to start a VM in fullscreen

[Steveneska]

Just wondering if it would be possible to add a full screen command line option like -F or -Fullscreen that will start a VM in the full screen configuration saved by the user in the VM config file, instead of starting the VM first and then switching to full screen from 86Box. Or would this only be possible if a start in full screen setting is saved in the VM config file by 86Box itself?