Method create

src/background/background.cpp:379–385

  public:
    using WayfireShellApp::WayfireShellApp;
    static void create(int argc, char **argv)
    {
        WayfireShellApp::instance =
            std::make_unique<WayfireBackgroundApp>(argc, argv);
        g_unix_signal_add(SIGUSR1, sigusr1_handler, (void*)instance.get());
        instance->run();
    }

    void handle_new_output(WayfireOutput *output) override
    {