add resources for a button to show/hide trihedron
add resources for a button to show/hide trihedron

FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui,FedoraScientific/salome-gui