Set MinimumSize X to MinDockingWidth
Set MinimumSize X to MinDockingWidth

- Issue MatterHackers/MCCentral#2612
Must have minimum size on DockingTabs

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