New permissions page

[Alexander Larsson <alexl redhat com>]

I just commited a rework of the permissions page in the file property
dialog. It has a simplified UI (and an advanced/unixy version availible
via a gconf setting) and support for recursive permission changes.

Could people please test this, and even better review the code if you're
able to. Its important that things like this doesn't break in data-loss
ways.

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 Alexander Larsson                                            Red Hat, Inc 
                   alexl redhat com    alla lysator liu se 
He's an oversexed misogynist gentleman spy on his last day in the job. She's a 
scantily clad thirtysomething wrestler from the wrong side of the tracks. They 
fight crime!