textBox: increase radius for rounded rect frame
Oil and Water: textBox: position, font-size

[#47173057]

Since we are now using the correct positioning for
textBox components positions of existing usage will
where customizing in the Interactive will need to be
adjusted.

In addition to make importing textBoxes from MML work
better the default font-size for textBoxes has been
reduced by 10%.

So adding a fontScale attribute to increase the fontSize
will also be necessary in many cases.

TODO: update other Interactives.