More GIO filesystem backends freeze break requests

[Carlos Garnacho <carlos imendio com>]

Hi!,

There's some more work by Bastien that could be worth to get in the GIO
filesystem backend before 2.22:

* 520605: GIO filechooser backend looks broken
        This one is about some icons not being shown with the correct
        sizes, nor having special directories their special icon. The
        size problem seems to be tricky and isn't still fixed by the
        patch in there.

* 520615: Unable to access unmounted locations
        Remote locations are not mounted when clicking in a bookmark
        pointing to them.
        
I'm really sorry to rush this in at this stage, Bastien has done an
awesome work at getting the filesystem backend fine tuned :)

Regards,
   Carlos