Method onAction

src/app/MenuBar.cpp:160–162

				MenuItem::step();
			}
			void onAction(const ActionEvent& e) override {
				APP->history->redo();
			}
		};
		menu->addChild(createMenuItem<RedoItem>("", widget::getKeyCommandName(GLFW_KEY_Z, RACK_MOD_CTRL | GLFW_MOD_SHIFT)));