[REQUEST] Form customizations

[smanu85]

(It seems that I can't pull a request so I've used this section)

First of all look at this image: http://www.smanu85.it/repo/images/migx_form1.png

It's possible to customize the MIGX form basing on these requests:

• form height: if I use only two text TVs (just an example) it would be useful if the form resizes its height according to the height of the tvs. It will show a vertical scrollbar only if the height is more than a default (or custom?) value;
• form horizontal scrollbar: This is a problem if if use just simple text TVs. It's possible to correct the width of the TVs to fit the inner width of the form (minus the padding?) to not show horizontal scrollbar?
• Possibility to customize the <h2> of the form tab