refacor media widget, apply clang format rule

include/connection/dbus/tray.hpp

@@ -19,6 +19,7 @@
 
 class TrayService : public DbusConnection {
     inline static TrayService *instance = nullptr;
+
   public:
     struct Item {
         std::string id;
@@ -66,7 +67,7 @@ class TrayService : public DbusConnection {
         if (TrayService::instance == nullptr) {
             TrayService::instance = new TrayService();
         }
-        
+
         return TrayService::instance;
     }
 
@@ -137,7 +138,7 @@ class TrayService : public DbusConnection {
     void begin_refresh(const std::string &id);
     static gboolean refresh_timeout_cb(gpointer user_data);
     static void on_refresh_finished_static(GObject *source, GAsyncResult *res,
-                                          gpointer user_data);
+                                           gpointer user_data);
     void emit_registered_items_changed();
 
     Glib::Variant<std::vector<Glib::ustring>>