getBoxQuads API maybe usable for this component

[jogibear9988]

Hello @danish1994 ,
I've worked on a polyfill for the getBoxQuads API(https://github.com/jogibear9988/getBoxQuadsPolyfill).
Info about the API: https://hacks.mozilla.org/2014/03/introducing-the-getboxquads-api/

I needed this API for my designer (https://node-projects.github.io/web-component-designer-demo/index.html), but maybe this could also be usable here.

With this API you could calculate the 4 corner points of an elements, even with complex and nested transformations.
And also you could transform a point into coordinates of another element.
At the moment the polyfill does not work 100% with SVG or MathML, but this is cause of missing offsetLeft/Top properties.