UI Freeze Break Request to enable Help button for Orca v2.20.1

[Willie Walker <William Walker Sun COM>]

Hi All:

As part of http://bugzilla.gnome.org/show_bug.cgi?id=475110, Matthew 
East updated the accessibility guide to include help documentation for 
Orca.  This helped enable us to support the request to enable help in 
Orca: http://bugzilla.gnome.org/show_bug.cgi?id=474958.

In working on bug 474958, we decided that we needed to add a "help" 
button to the Orca main window in addition to the one that is already in 
the preferences dialog.  This UI Freeze Break Request is to request 
permission to add the Help button to the main window for Orca v2.20.1 
(for GNOME v2.20.1).  No new strings have been added.

Thoughts?

Will
(Orca project lead)