Discovered something I consider a little inconsistent, but also an odd bug.
If you add item through the start popup plugin command you are presented with an icon of the item and the item's name associated. But if you set the Start item popup quantity to -1 as an example -the "-" icon and name appear. To me it feels a little inconsistent where adding an item has no "+" .
As for the bug itself, if you have the Start item popup item quantity use a negative value the display itself shows a "-", item's icon, name and then strangely a "X1" on the end of the popup. There seems to be no input made here regarding that and I don't understand why that even shows.