Bug 1022383 - [Collection App] Should show four columns instead of three

https://bugzilla.mozilla.org/show_bug.cgi?id=1022383
To be honest I'm not sure, I think generally parseInt is more clear and we use it in other places. I suppose I would be happier with whatever performs better and I would assume that doing a parse is going to be more performant instead of doing a type conversion, but I have not tested this.