Bug 318833

If I pick an Image from the Image Thumbbar on the right of Image Editor, and drop it onto the Image Thumbbar itself, then all images except the picked one vanishes and Properties sidebar on the left becomes unable to show properties of even the single image that remains.

*True for ImageEditor opened with single Image or Multiple Images.

*Bug only in Digikam:ImageEditor Image ThumbBar(on the right), not in ShowFoto Thumbbar as it does not use drag and drop or Light Digikam Image Thumbbar as it supports Grouping of Images on Drag and Drop. It is not even in Light Table Image Thumbbar.

Reproducible: Always

Steps to Reproduce:
1.Open Digikam,select 1 or more Images and Open them with ImageEditor using F4(or Edit).The properties of the images are shown.
2.Pick an image from the ImageEditor:Image ThumbBar(on the left)
3.Drop it onto the Image ThumbBar itself.
Actual Results:  
All Images except the picked one vanishes and Properties in the properties sidebar(on the left) are not shown thereon(even after clicking on the image that remained in the ImageThumbBar).

Expected Results:  
Images in the ImageThumbbar(left) must not vanish,they should occupy their original position in the ThumbBar. 
Properties in the properties sidebar(right) must not vanish, they should be shown according to the current selection whether the image is drag&dropped or not.