Workaround: It is possible to remove the plus sign by dragging a launcher that is already in the panel over it. The green plus sign will disappear and the launcher will not be affected. But as soon as you restart the panel, the green sign is back again.
Workaround: It is possible to remove the plus sign by dragging a launcher that is already in the panel over it. The green plus sign will disappear and the launcher will not be affected. But as soon as you restart the panel, the green sign is back again.