Setup context menu

def setup_menu(self):
        """Setup context menu"""
        self.copy_action = create_action(self, _('Copy'),
                                         shortcut=keybinding('Copy'),
                                         icon=ima.icon('editcopy'),
                                         triggered=self.copy,
                                         context=Qt.WidgetShortcut)
        menu = QMenu(self)
        add_actions(menu, [self.copy_action, ])
        return menu