#142 sorting takes looooong

[Roger Wolff]

sorting takes MUCH longer when selected from the menu, than when starting up.

I'm writing this "bug" report while gqview is STILL sorting my 19000 entry list of files. (Its due to the work I do that indeed I need to work with directories that hold that many jpgs) It's been sorting for 7 CPU minutes solid now. "ls" takes less than a second to soft that same list of files, so gqview must be doing something really inefficient.

The algorithm when starting up to sort the list is MUCH more efficient, as it is usable on the 19000 entry directory, but resorting after startup is taking way too long to be usable.