Can't drag a list of selected Operations over a Collection

[AFract]

Describe the bug
I can add an operation to a collection by drag-drop it from the operation list, but I can't do the same for a list of operations.
If I select more than one operation before the drag-drop, only the first one of the selected list is added to the collection.

To Reproduce
I hope the explanation above is enough, but I can do an animated gif if needed.

Expected behavior
I would like to add several operations to the collection at once :)

Environment (if possible, copy the information from the error dialog or the About menu):
Windows 10, Kreya 1.15.1 beta 1.

[CommonGuy]

Currently only dragging one operation is supported, but dragging several operations or a whole folder definitely makes sense.