Reinstate a feature from 1.x. The expanding of the text-frame when the text does not fit.
This redesign has the following changes;
* The text is layouted before requesting a resize. Which means we are not guessing what the new size should be, we just add exactly what we need.
* Resizing a frame is limited to the page-margins. So it will not auto-resize outside the page-margins but will request a new page.