QVFb skin combo box does not contain all skins (UI is bad)

This is a regression from 4.1.

QVFb has a skin combo box that (in 4.1) contained all of the skins in the directory QVFb is started from.

In 4.2 (latest, not sure what point it was broken) the list contains only a few items and a "Browse" item that lets you locate skins. There are 3 problems with this:

1) There is n+1 items in the list (where n is the number that can fit without a scroll bar).
2) The items are not sorted in any meaningful way (so a "random" set of skins is available in QVFb).
3) The file explorer lets you browse into .skin directories.

The 4.1 behaviour is much more clear. There is no reason to navigate to skins in another location though I can't see a particular reason to remove the "Browse" entry. It would be nice (though probably not possible) to prevent selecting into .skin directories from the file explorer.

Note that Ian has done work on QVFb in recent times and might be the best person to work on this.