[glade] Add "Stack" to "Add parent" menu

[Juan Pablo Ugarte <jpu src gnome org>]

commit ab46b4ecfb57131188dbd92cde52a012470a2ddf
Author: Florian Richter <florian richter-es de>
Date:   Mon Aug 24 18:33:46 2015 +0200

    Add "Stack" to "Add parent" menu
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754030

 plugins/gtk+/glade-gtk-widget.c |    2 ++
 plugins/gtk+/gtk+.xml.in        |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/plugins/gtk+/glade-gtk-widget.c b/plugins/gtk+/glade-gtk-widget.c
index 019f109..e192281 100644
--- a/plugins/gtk+/glade-gtk-widget.c
+++ b/plugins/gtk+/glade-gtk-widget.c
@@ -881,6 +881,8 @@ glade_gtk_widget_action_activate (GladeWidgetAdaptor * adaptor,
         new_type = GTK_TYPE_BOX;
       else if (strcmp (action, "paned") == 0)
         new_type = GTK_TYPE_PANED;
+      else if (strcmp (action, "stack") == 0)
+        new_type = GTK_TYPE_STACK;
 
       if (new_type)
         {
diff --git a/plugins/gtk+/gtk+.xml.in b/plugins/gtk+/gtk+.xml.in
index 4550b24..93e3e9e 100644
--- a/plugins/gtk+/gtk+.xml.in
+++ b/plugins/gtk+/gtk+.xml.in
@@ -48,6 +48,7 @@
           <action id="grid" _name="Grid"/>
           <action id="box" _name="Box"/>
           <action id="paned" _name="Paned"/>
+          <action id="stack" _name="Stack"/>
         </action>
         <action id="sizegroup_add" _name="Add to Size Group"/>
         <action id="clear_properties" _name="Clear properties" stock="edit-clear"/>