Comment 5 for bug 741778

Okay, now I feel thoroughly silly. It turns out that the link already does have a context menu similar to what I just described. So I'm marking this fixed, I've added the context menu to the main spec, and I've specced the drag-and-drop behavior as something anyone can implement later. <https://wiki.ubuntu.com/SoftwareCenter?action=diff&rev2=589&rev1=588>