Bug 1038390 - Make Your Own Make-Masonry

<https://bugzilla.mozilla.org/show_bug.cgi?id=1038390>
obviously this is super hacky, but what is happening is that imagesLoaded() isn't getting accurate information because the delay is in rendering from MakeAPI. Is the Make factory able to expose some sort of "rendering complete" bool, or something? do you have any ideas on how to work around this?

For an example of what I'm talking about, load <http://localhost:7777/make-your-own> on this branch and resize the window a few times after the page is loaded.