Add example with QMenu in comments for ctkSignalMapper::map(QAction*)
Add example with QMenu in comments for ctkSignalMapper::map(QAction*)

The example is similar to what is done in the ctkSignalMapperTest1 with
a QActionGroup.

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