[gnome-calendar] edit-dialog: change source image to button

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 9364cab3de77d63d2f2d8500c79500da33bc9b7f
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Dec 5 14:37:26 2014 -0200

    edit-dialog: change source image to button
    
    This is a stub button for the sources. Implementation of it will come soon.

 data/ui/edit-dialog.ui |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/data/ui/edit-dialog.ui b/data/ui/edit-dialog.ui
index 95a4acb..3710bce 100644
--- a/data/ui/edit-dialog.ui
+++ b/data/ui/edit-dialog.ui
@@ -158,10 +158,18 @@
               </packing>
             </child>
             <child>
-              <object class="GtkImage" id="source_image">
+              <object class="GtkMenuButton" id="sources_button">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
+                <property name="can_focus">True</property>
                 <property name="halign">start</property>
+                <property name="use_popover">True</property>
+                <child>
+                  <object class="GtkImage" id="source_image">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="halign">start</property>
+                  </object>
+                </child>
               </object>
               <packing>
                 <property name="left_attach">3</property>