Fix for problem: SIGSEGV appears if to select group after opening "Edit Group" dialog box.
Fix for problem: SIGSEGV appears if to select group after opening "Edit Group" dialog box.

FedoraScientific/salome-smesh,FedoraScientific/salome-smesh,FedoraScientific/salome-smesh,FedoraScientific/salome-smesh