Add more flexible sorting algorithm.

[ghost]

Add the foundations for providing user customisable sorting of the
formats in the downloads panel.

[inbasic]

So would you like this being merged? If so what options are we going to provide to users?

[ghost]

I wouldn't exactly merge as is, as I was too hasty removing your previous sort algorithm. Also how I configured my sort algorithm to match yours was just a guesstimate.

It is up to you if it is something you would like to merge; if it is something you want to merge, I will create an interface for it in the options dialog box. It will be just text boxes that will take comma separated values, a button loading defaults, checkbox to override the current sorting algorithm.

I actually don't need this amount of flexibility but I wrote it this way for possibly the projects benefit.