Numerically (px/%) configure corner radius on rounded corner shapes

This corner radius issue occurs with the captions also (speech bubbles with the triangle you can adjust to point where you need it to). When you adjust the triangle pointer attached to the caption to the side vs up/down or even resize the box, it randomly changes the curves and margin for the text sitting inside the boxes. Which makes that very inconsistent and tricky to use. A fix to these issues would make the building of modules much smoother and avoid the need for workarounds (e.g. use of external graphics tools/overlaying text boxes where it is not wildly out in shape).