Layout of multiple iFrames is not correct

[rkwright]

The layout of a pre-paginated EPUB book that contains a set of widgets that constitute a quiz is not correct. The quiz consists of 3 panels that are the questions and one that is the results of the quiz. If the window is shrunk down, instead of shrinking the contents, the panels become overlapped. It appears (from a quick look at the sources) that each quiz is a separate widget, hence iFrame.

In SDKLauncher-OSX, the layout is not correct (develop branch). However, the layout IS correct in the Chrome Extension (develop branch).
The test file is here (to be posted soon)