docs: def add_menu_item(self, command, title):
          """
          Add mouse right click menu item.
          Args:
            command (callable): function that will be called after left mouse click on title
            title (str): label that will be shown in menu
          """
          m_item = Gtk.MenuItem()
          m_item.set_label(title)
          m_item.connect('activate', command)
          self.menu.append(m_item)
          self.menu.show_all()