[gnome-calendar] source-dialog: add button is insensitive by default

[Erick Pérez Castellanos <erickpc src gnome org>]

commit f724a6aaf61097137233bf41ec66f90514637516
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Feb 10 00:05:58 2015 -0200

    source-dialog: add button is insensitive by default
    
    We must convince him to get sensitive by selecting a valid source.

 data/ui/source-dialog.ui |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/source-dialog.ui b/data/ui/source-dialog.ui
index 83b6833..151fc9c 100644
--- a/data/ui/source-dialog.ui
+++ b/data/ui/source-dialog.ui
@@ -267,6 +267,7 @@
             <property name="label" translatable="yes">Add</property>
             <property name="visible">True</property>
             <property name="can_focus">True</property>
+            <property name="sensitive">False</property>
             <property name="receives_default">True</property>
             <signal name="clicked" handler="action_widget_activated" object="GcalSourceDialog" swapped="no"/>
           </object>