xffm updates

[edscott wilson garcia]

I've updated a few changes to xffm. Also some bug fixes. You can now
hide/show the upper bars with one click "a la" mozilla. It will also set
it as user preference (although preferences are not yet stored to disk
file). This should solve the "too many toolbars" issue, I hope. 

Jens, you might want to take a look at the new glade file for any
improvements it might need.

Edscott