Verno wrote on Sep 11, 2012, 08:45:
Another new feature in the beta client, kinda hidden:
Finally per application space sorting.
Gibbed was talking about it in IRC last night:Apparently you can get it to appear by running Steam with -dev commandline arg then using the install_folder_ui command. It's in the beta client update. Used space sorts horribly though. It sorts by text rather than value.
So it's obviously still in testing but it appears to be a major feature coming soon.