Setup context menu common actions

def setup_common_actions(self):
        """Setup context menu common actions"""
        actions = super(ExplorerTreeWidget, self).setup_common_actions()
        if self.show_cd_only is None:
            # Enabling the 'show current directory only' option but do not
            # allow the user to disable it
            self.show_cd_only = True
        else:
            # Show current directory only
            cd_only_action = create_action(self,
                                           _("Show current directory only"),
                                           toggled=self.toggle_show_cd_only)
            cd_only_action.setChecked(self.show_cd_only)
            self.toggle_show_cd_only(self.show_cd_only)
            actions.append(cd_only_action)
        return actions