Description of problem:
Perspective layout editor drag and drop does not work in Internet Explorer. After release of item, only red rectangle is shown. Both grid system and component have same issue.
Version-Release number of selected component (if applicable):
Internet Explorer 11 on Windows 8.1
Steps to Reproduce:
1. Create perspective layout editor. (Extensions -> Plugin management -> New... -> New perspective layout)
2. Drag grid system item or one of component items and move mouse to column.
3. Release mouse button.
Red rectangle is displayed. Item is not added into column.
Item is added into column.