I'm not sure whether this was in a previous build, but I'm delighted to find that things I could not seem to do before in the Project Resources box can now be done: -
(a) moving files from the right-hand panel to another folder in the left-hand panel by dragging with the mouse;
(b) making a folder in the left-hand panel a sub-folder of another folder - and reversing that procedure by making it again a sub-folder of /(project folder) sends it to the bottom of the list, so allowing the changing of the order of folders in the left-hand panel.

Frank