Lightburn doesn't seem to handle unresponsive GRBL interface when on Hold or Door

If LightBurn leaves the “streaming” state and goes back to command processing, it will lose its place (and your job). If I make it trigger the “paused” state internally, the “Pause” button would become “Resume” and the resume button will trigger the immediate mode command to continue. Stop triggers Ctrl+X, so it should all behave.