WIP-Adding Drag and Drop to Resourcelist Layout
Added Drag and Drop functionality to the Resources Config window (Fixes #29)

* Drag is intiated by clicking on an icon for a resource or separator
* Holding the drag near the top or bottom will move the scrollview
* Releasing will then reorder
* Releasing when theres no yellow insertion icon will cancel the drag
WIP-Adding button to Add Separator in List (related to #23)

As its stored in a dictionary though after a delete its adding things in the middle of the list
Adding Sep below a resource now done (Fixes #23)

Fixed issue with empty dictionary entries by writing to a list and back - not elegant at all