Code review comment for lp:~gary-lasker/software-center/list-view-icon-coordinates-lp947624

Thank you, mvo! That main tricky part was getting the coordinates via Cairo, but the other bits weren't too bad as it was already partially stubbed out from the original work in anticipation of needing this.

And yeah, the RED/GREEN dance would normally be more finely grained, but it was a kinda big RED (the full feature working) and needed a few interim steps before I finally reached GREEN. ;)

Thanks again!