[patch] change sort order with single keyboard shortcut

[David Sterba]

Hi,

> After applying my patch, following keys start
> to work:
>  Sort by name               Ctrl-F3
>  Sort by extension          Ctrl-F4
>  Sort by modification time  Ctrl-F5
>  Sort by size               Ctrl-F6
>  Keep unsorted              Ctrl-F7
>  Sort by creation time      Ctrl-F8
>  Sort by access time        Ctrl-F9
Ctrl-Fx keys are predefined in KDE to switch desktop and most users
don't change it.
You should choose different unused key set. Yes, it may be difficult :-)


David