[pitivi] Make the "User Manual" menu item work in the main MenuButton

[Jean-François Fortin Tam <jfft src gnome org>]

commit f0d8f4fea1818e6f7c574b36b01194ba6ab13e65
Author: Jean-François Fortin Tam <nekohayo gmail com>
Date:   Sun Sep 28 19:26:27 2014 -0400

    Make the "User Manual" menu item work in the main MenuButton
    
    This item was insensitive because it was bound to the wrong action name

 data/ui/mainmenubutton.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/mainmenubutton.ui b/data/ui/mainmenubutton.ui
index 98a0586..8e5c13d 100644
--- a/data/ui/mainmenubutton.ui
+++ b/data/ui/mainmenubutton.ui
@@ -111,7 +111,7 @@
       <object class="GtkMenuItem" id="menu_help">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <property name="action_name">win.user_manual</property>
+        <property name="action_name">win.help</property>
         <property name="label" translatable="yes">User Manual</property>
         <property name="use_underline">True</property>
       </object>