gnome-panel menu lockdown proposal

[Matt Keenan <Matt Keenan Sun COM>]

At Guadec last year in Villanova, one of the topics that came up from 
Luis's talk
on what our customers want from Gnome was the ability to restrict the 
gnome menus.


Here's the solution we've implemented for this exact purpose, simply 
involves
two new global desktop lockdown keys :

- desktop/gnome/lockdown/restrict_application_launching
 
  Boolean value, that simply states whether restricted application 
launching
  is switched on or not.


- desktop/gnome/lockdown/allowed_applications

  A list of string's containing full path's to applications that are 
allowed.
  e.g. /usr/local/bin/evince etc...


Three patches are required for this :

 - gnome-panel (DONE)- Check of restricted application launching is set 
to true then :
   - hide items on menus whose application is not in the allowed list
   - hide launcher icons on panels whose application is not in the 
allowed list
   - Restrict creating of launchers by D'n'D whose application are not 
in the allowed
     list.

 - libgnome (DONE but needs updating) - provide default schema for two 
new gconf keys

 - Pessulus (TODO) - Update to allow editing of new gconf keys.


Posting here to get some feedback from people.
Patches are available on request.

cheers

Matt