ctkSettingsPanel can register properties from same sender
ctkSettingsPanel can register properties from same sender

Before, the QSignalMapper was returning the same property
(the last one registered) from a sender that had multiple registered
properties.
By using a unique QSignalMapper per property, we fix that problem.
This is particularly useful when registering custom properties from
the setting panel itself instead of typical basic widgets (QLineEdit,
QCheckBox...)

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