[ptx] no copy and paste in open file popup dialog

[manouchk]

Hi,

I recently remarked that the "open file" pop-up dialog does not allow to copy 
and paste the directory which was formerly very practical. My hugin is now 
compiled with wxGTK 2.6.0.
see snapshot:
http://emmanuelfavrenicolin.free.fr/Public/Divers/Snapshots/snap_hugin_openfiledialog.jpg
Is it due to wx GTK2.6.0?

Furthermore on the snapshot you can see "ugly caracters" for one directory 
that should be Séjour_parents and is something else.
The name of the file are UTF-8 encoded.