[gnome-weather] Window: use a header_bar for the about dialog

[Giovanni Campagna <gcampagna src gnome org>]

commit 6c707d3dbf0853cce37213cb4e2b7bda99f9dd44
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Sun Jan 19 15:05:07 2014 +0100

    Window: use a header_bar for the about dialog
    
    Consistent with modern GTK+

 src/window.js |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/window.js b/src/window.js
index b6a2536..2a21691 100644
--- a/src/window.js
+++ b/src/window.js
@@ -319,7 +319,8 @@ const MainWindow = new Lang.Class({
               website: 'https://wiki.gnome.org/Apps/Weather',
               wrap_license: true,
               modal: true,
-              transient_for: this
+              transient_for: this,
+              use_header_bar: true
             });
 
         aboutDialog.show();