kcms/workspaceoptions: Add option for alternative Drag & Drop behavior
This adds the ability to set the default action when drag and dropping files on the same device to be "move". This fixes and is a continuation of the older patches in: https://bugs.kde.org/show_bug.cgi?id=154804
This depends on some changes in KIO to support this: frameworks/kio!1856 (merged)
Edited by Nate Graham
