Accept dropping file to the workspace only when workflow state is idle
Accept dropping file to the workspace only when workflow state is idle

cncjs/cncjs,cheton/piduino-grbl,cheton/cnc.js,cheton/cnc,cheton/cnc,cheton/cnc,cheton/piduino-grbl,cheton/cnc.js,cheton/cnc.js,cncjs/cncjs,cheton/piduino-grbl,cncjs/cncjs