Description:
I noticed this problem after an update. Basically, if I click a slide (A) in the slide pane and drag it in-between two slides (B-C), the slide is supposed to be moved between them, i.e. the final order is B-A-C. This probably happens by a mechanism that makes a copy of the slide A between B and C, and then deletes the original A from the original position.

But if one clicks on slide A, and not drag it to anywhere, slide A is deleted. This happens with the slightest up-down movement of the mouse during the selection, which is something that a typical user always does to a certain extent.

What seems to happen in the background is that if the user does not drag the slide sufficiently far away, then B=A, the slide A is tried to be inserted between A and C, rather than B & C. The slide is deleted from its previous location, without making a copy at its original position, causing loss of data.

Actual Results:
Make a presentation with 2 slides.
On the slide pane (left), drag second slide downwards
Slide 2 will disappear

Expected Results:
Make a presentation with 2 slides.
On the slide pane (left), drag second slide downwards
Slide 2 does not move anywhere.


Reproducible: Always


User Profile Reset: No



Additional Info:
I think something like this should be added:

if (the move-to-location == move-from-location)
>>>do nothing
else
>>>make a copy at the move-to-location
>>>remove the copy at the move-from-location
end