[gnome-calendar] source-dialog: add a smooth transition to web sources listbox

[Erick Pérez Castellanos <erickpc src gnome org>]

commit a704bd3d4cc8ad8e45e70ecd7e50526d6c0ebddf
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Apr 20 17:28:53 2015 -0300

    source-dialog: add a smooth transition to web sources listbox

 data/ui/source-dialog.ui |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/source-dialog.ui b/data/ui/source-dialog.ui
index cdcb94f..8c88fee 100644
--- a/data/ui/source-dialog.ui
+++ b/data/ui/source-dialog.ui
@@ -697,6 +697,8 @@
                     <child>
                       <object class="GtkRevealer" id="web_sources_revealer">
                         <property name="can_focus">False</property>
+                        <property name="transition_type">crossfade</property>
+                        <property name="transition_duration">200</property>
                         <child>
                           <object class="GtkBox" id="web_sources_listbox_box">
                             <property name="visible">True</property>