Ignore AfterSelect events during SelectionChanged
Ignore AfterSelect events during SelectionChanged

- Issue MatterHackers/MCCentral#3529
Scene spins indefinitely in rebuild loop

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