Remove 'Add to Queue' library menu
Remove 'Add to Queue' library menu

- Issue MatterHackers/MCCentral#3291

mmoening/MatterControl,mmoening/MatterControl,jlewin/MatterControl,jlewin/MatterControl,jlewin/MatterControl,jlewin/MatterControl,unlimitedbacon/MatterControl,larsbrubaker/MatterControl,unlimitedbacon/MatterControl,larsbrubaker/MatterControl,unlimitedbacon/MatterControl,larsbrubaker/MatterControl,larsbrubaker/MatterControl,mmoening/MatterControl,unlimitedbacon/MatterControl