Fix null reference on PopupContent object
Fix null reference on PopupContent object

- Make base explicitly call to virtual function after content load
- Remove debugging color, switch back to expected - White

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