I hate to be a party pooper but while someone in development many consider adding colour overlays onto the search results and changing arrows from the normal convention of Plus and minus on folders a real advance in the user experience. it does seems a case of eye candy over function.
I really think that the developers might be better employed adding a right click for the normal cut, copy,paste and delete options. It's all pretty standard interface convention these days and I am really supprised that we don't have it after all this time.
While that is being added, can we please please have the option to collapse all those folders that remain open after a search has been run. The more inventory items you have the worse it is. A simple 'collapse all' option would suffice.
It's a great game but sometimes, looking at the real usability issues is preferable to adding new features that don't really add a huge benefit.