NOTE: I *know* this messes up the PUD.
This will eventually be fixed.

Start to refactor the PUD a bit to make calculating geometry much easier.
Instead of using SVG sizes to calculate item sizes, use a svgElmenRect which can be programatically set and (eventually) scale the SVG to fit.

This simplifies a lot of logic.

However until I am done the PUD graphics are a bit borked (though they do work).