Please describe the problem:
When I drag any item and move it over the sidepanel, a dark drag line is drawn, but it doesn't go away when the item is droped elsewhere or if it's not dropped.

Steps to reproduce:
1. open nautilus with its places sidepanel
2. drag a file or any item over the sidepanel, at the bottom of the places list.
3. drop it elsewhere
in

Actual results:
A dark drag line remains drawn

Expected results:
the dark line should only be drawn when the drug item is over the sidepanel.This line should be removed in any other case (it's removed correctly if you drag the item over other positions in the places list)

Does this happen every time?
Always

Other information: