Nice job overall. My only nitpick is that there are no affordances to know that you can drag/drop elements. I've often started dragging things by accident only

Nice job overall. My only nitpick is that there are no affordances to know that you can drag/drop elements. I've often started dragging things by accident only to find out that it's the default behaviour of links. Probably so you can drag them to the toolbar/desktop etc. If I didn't know about the dd behaviour of this table, I would probably never use it. Otherwise it's pretty nice!