window: Simplify window menu

We could have relied on the popover menu automatic
menu handling capabilities from the very beginning.

data/ui/weather-settings.ui

@@ -10,7 +10,7 @@
     <child>
       <object class="GtkModelButton">
         <property name="text" translatable="yes">_Weather</property>
-        <property name="menu-name">main-menu</property>
+        <property name="menu-name">main</property>
         <property name="inverted">True</property>
         <property name="centered">True</property>
         <property name="visible">True</property>

data/ui/window.ui

@@ -370,55 +370,44 @@
     <signal name="response" handler="edit_dialog_closed" object="GcalWindow" swapped="no"/>
     <signal name="delete-event" handler="gtk_widget_hide_on_delete" object="GcalWindow" swapped="no"/>
   </object>
+
   <object class="GtkPopoverMenu" id="win_menu">
-    <signal name="notify::visible" handler="on_popover_menu_visible_cb" object="GcalWindow" swapped="no" />
     <child>
-      <object class="GtkStack" id="win_menu_stack">
+      <object class="GtkBox">
         <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="homogeneous">False</property>
-        <property name="transition_type">slide-left-right</property>
-        <property name="interpolate-size">True</property>
+        <property name="margin">12</property>
+        <property name="orientation">vertical</property>
+
+        <!-- Synchronize -->
         <child>
-
-          <!-- New Event -->
-          <object class="GtkBox">
-            <property name="margin">12</property>
+          <object class="GtkModelButton">
             <property name="visible">True</property>
-            <property name="orientation">vertical</property>
-
-            <!-- Synchronize -->
-            <child>
-              <object class="GtkModelButton">
-                <property name="text" translatable="yes">_Synchronize</property>
-                <property name="action-name">app.sync</property>
-                <property name="visible">True</property>
-              </object>
-            </child>
-            <child>
-              <object class="GtkModelButton" id="win-menu-open-weather">
-                <property name="text" translatable="yes">_Weather</property>
-                <property name="menu-name">weather-menu</property>
-                <property name="visible">True</property>
-              </object>
-            </child>
+            <property name="action-name">app.sync</property>
+            <property name="text" translatable="yes">_Synchronize</property>
           </object>
-          <packing>
-            <property name="name">main-menu</property>
-          </packing>
         </child>
 
         <!-- Weather -->
         <child>
-          <object class="GcalWeatherSettings" id="weather_settings">
+          <object class="GtkModelButton">
             <property name="visible">True</property>
-            <property name="can_focus">False</property>
+            <property name="menu-name">weather</property>
+            <property name="text" translatable="yes">_Weather</property>
           </object>
-          <packing>
-            <property name="name">weather-menu</property>
-          </packing>
         </child>
       </object>
     </child>
+
+    <!-- Weather submenu -->
+    <child>
+      <object class="GcalWeatherSettings" id="weather_settings">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+      </object>
+      <packing>
+        <property name="submenu">weather</property>
+      </packing>
+    </child>
+
   </object>
 </interface>

src/gcal-window.c

@@ -126,7 +126,6 @@ struct _GcalWindow
   GtkWidget          *today_button;
   GtkWidget          *forward_button;
   GtkWidget          *views_switcher;
-  GtkWidget          *win_menu_stack;
 
   /* new event popover widgets */
   GtkWidget          *quick_add_popover;
@@ -929,14 +928,6 @@ window_state_changed (GtkWidget *widget,
   return FALSE;
 }
 
-static void
-on_popover_menu_visible_cb (GtkWidget  *widget,
-                            GParamSpec *pspec,
-                            GcalWindow *self)
-{
-  gtk_stack_set_visible_child_name (GTK_STACK (self->win_menu_stack), "main-menu");
-}
-
 static void
 edit_event (GcalQuickAddPopover *popover,
             GcalEvent           *event,
@@ -1479,7 +1470,6 @@ gcal_window_class_init (GcalWindowClass *klass)
   gtk_widget_class_bind_template_child (widget_class, GcalWindow, views_overlay);
   gtk_widget_class_bind_template_child (widget_class, GcalWindow, views_stack);
   gtk_widget_class_bind_template_child (widget_class, GcalWindow, views_switcher);
-  gtk_widget_class_bind_template_child (widget_class, GcalWindow, win_menu_stack);
   gtk_widget_class_bind_template_child (widget_class, GcalWindow, weather_settings);
   gtk_widget_class_bind_template_child (widget_class, GcalWindow, week_view);
   gtk_widget_class_bind_template_child (widget_class, GcalWindow, year_view);
@@ -1497,8 +1487,6 @@ gcal_window_class_init (GcalWindowClass *klass)
   gtk_widget_class_bind_template_callback (widget_class, view_changed);
   gtk_widget_class_bind_template_callback (widget_class, date_updated);
 
-  gtk_widget_class_bind_template_callback (widget_class, on_popover_menu_visible_cb);
-
   /* Event removal related */
   gtk_widget_class_bind_template_callback (widget_class, hide_notification);
   gtk_widget_class_bind_template_callback (widget_class, remove_event);