ctkCollapsibleButton was setting grandchildren visibility
ctkCollapsibleButton was setting grandchildren visibility

ctkCollapsibleButton should only care of it's direct children, not it's
grand children.

naucoin/CTK,Sardge/CTK,finetjul/CTK,jcfr/CTK,danielknorr/CTK,lassoan/CTK,jcfr/CTK,ddao/CTK,151706061/CTK,pieper/CTK,CJGoch/CTK,Sardge/CTK,Heather/CTK,finetjul/CTK,danielknorr/CTK,fedorov/CTK,mehrtash/CTK,msmolens/CTK,Sardge/CTK,lassoan/CTK,finetjul/CTK,SINTEFMedtek/CTK,AndreasFetzer/CTK,pieper/CTK,lassoan/CTK,151706061/CTK,msmolens/CTK,sankhesh/CTK,SINTEFMedtek/CTK,jcfr/CTK,naucoin/CTK,CJGoch/CTK,pieper/CTK,espakm/CTK,AndreasFetzer/CTK,CJGoch/CTK,vovythevov/CTK,sankhesh/CTK,fedorov/CTK,commontk/CTK,laurennlam/CTK,SINTEFMedtek/CTK,SINTEFMedtek/CTK,151706061/CTK,Sardge/CTK,vovythevov/CTK,ddao/CTK,AndreasFetzer/CTK,vovythevov/CTK,danielknorr/CTK,mehrtash/CTK,laurennlam/CTK,espakm/CTK,lassoan/CTK,sankhesh/CTK,naucoin/CTK,finetjul/CTK,CJGoch/CTK,Heather/CTK,rkhlebnikov/CTK,naucoin/CTK,151706061/CTK,msmolens/CTK,CJGoch/CTK,mehrtash/CTK,commontk/CTK,pieper/CTK,Heather/CTK,vovythevov/CTK,rkhlebnikov/CTK,mehrtash/CTK,espakm/CTK,rkhlebnikov/CTK,151706061/CTK,Heather/CTK,commontk/CTK,fedorov/CTK,commontk/CTK,SINTEFMedtek/CTK,jcfr/CTK,fedorov/CTK,ddao/CTK,ddao/CTK,laurennlam/CTK,sankhesh/CTK,msmolens/CTK,espakm/CTK,jcfr/CTK,laurennlam/CTK,danielknorr/CTK,AndreasFetzer/CTK,rkhlebnikov/CTK