Use automatic primary menu keyboard shortcut

data/gtk/window.blp

@@ -24,8 +24,9 @@ template RugbyAppWindow : Adw.ApplicationWindow {
       }
 
       [end]
-      MenuButton menu_button {
+      MenuButton {
         direction: none;
+        primary: true;
         menu-model: app_menu;
         tooltip-text: "Main Menu";
       }

src/main.c

@@ -68,9 +68,6 @@ on_startup (GApplication          *app,
                                      app_entries,
                                      G_N_ELEMENTS (app_entries),
                                      app);
-    gtk_application_set_accels_for_action (GTK_APPLICATION (app),
-                                           "win.show-primary-menu",
-                                           (const char*[]) { "F10", NULL });
     gtk_application_set_accels_for_action (GTK_APPLICATION (app),
                                            "app.prefs",
                                            (const char*[]) { "<Ctrl>comma", NULL });

src/rugby-app-window.c

@@ -18,7 +18,6 @@ struct _RugbyAppWindow
     AdwApplicationWindow parent;
 
     GtkWidget *scorespin;
-    GtkWidget *menu_button;
     GtkWidget *stack;
     GtkWidget *empty_page;
     GtkWidget *list_page;
@@ -109,15 +108,6 @@ activate_score_changed (G_GNUC_UNUSED GSimpleAction *action,
         g_assert_not_reached ();
 }
 
-static void
-activate_show_primary_menu (G_GNUC_UNUSED GSimpleAction *action,
-                            G_GNUC_UNUSED GVariant      *parameter,
-                                          gpointer       user_data)
-{
-    RugbyAppWindow *self = RUGBY_APP_WINDOW (user_data);
-    gtk_menu_button_popup (GTK_MENU_BUTTON (self->menu_button));
-}
-
 static void
 rugby_app_window_dispose (GObject *object)
 {
@@ -133,7 +123,6 @@ rugby_app_window_init (RugbyAppWindow *self)
 
     const GActionEntry win_entries[] = {
         { .name = "score-changed", .activate = activate_score_changed, .parameter_type = "s" },
-        { .name = "show-primary-menu", .activate = activate_show_primary_menu },
     };
 
     g_action_map_add_action_entries (G_ACTION_MAP (self),
@@ -157,7 +146,6 @@ rugby_app_window_class_init (RugbyAppWindowClass *klass)
                                                  "/uk/me/bcowan/Rugby/gtk/window.ui");
 
     gtk_widget_class_bind_template_child (widget_class, RugbyAppWindow, scorespin);
-    gtk_widget_class_bind_template_child (widget_class, RugbyAppWindow, menu_button);
     gtk_widget_class_bind_template_child (widget_class, RugbyAppWindow, stack);
     gtk_widget_class_bind_template_child (widget_class, RugbyAppWindow, empty_page);
     gtk_widget_class_bind_template_child (widget_class, RugbyAppWindow, list_page);