Drag-and-drop on a content file in the launcher creates duplicate items
Steps to reproduce:
- Keep the "Alt" key held down.
- Start dragging a content file.
- Drop it on itself.
Result: a duplicate item will be created, see screenshot.
This does not happen if the Alt key is not held down, for some reason holding the Alt key makes the "Drop on itself" action available which normally is not available.
(RM-2334 from redmine: created on 2015-02-02 by scrawl ., , closed on 2015-02-06 by scrawl .)