Reimplemented support form using MiGLayout, other improvements.

Support form will now close upon successful submission; added email
confirmation field; javadocs; improved error message if there was a
problem on the webserver.

[1411]
Added constructor that accepts Collections of Components, javadocs. [1411]
Added short class description. [1411]
Removed "default" constructor, added some quick javadocs [1411]