[gtk+] Add summary and description to "show-hidden" key

[Federico Mena Quintero <federico src gnome org>]

commit f1532993eb5e38839e686f378e23786075bc720c
Author: Timothy Arceri <t_arceri yahoo com au>
Date:   Tue Dec 4 07:59:49 2012 +1100

    Add summary and description to "show-hidden" key
    
    https://bugzilla.gnome.org/show_bug.cgi?id=689584

 gtk/org.gtk.Settings.FileChooser.gschema.xml |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/org.gtk.Settings.FileChooser.gschema.xml b/gtk/org.gtk.Settings.FileChooser.gschema.xml
index b53abfc..6b8d1a3 100644
--- a/gtk/org.gtk.Settings.FileChooser.gschema.xml
+++ b/gtk/org.gtk.Settings.FileChooser.gschema.xml
@@ -42,6 +42,8 @@
     </key>
     <key name='show-hidden' type='b'>
       <default>false</default>
+      <_summary>Whether to show hidden files</_summary>
+      <_description>If set to true, then hidden files are shown by default.  Hidden files are either dotfiles, listed in the folder's .hidden file or backup files ending with a tilde (~).</_description>
     </key>
     <key name='expand-folders' type='b'>
       <default>false</default>