I'm not a big user of the form editor, but I just
opened a form of
Jarda's from the branch of the Diff module, and of
course, a number
of component classes weren't found, making it
harder to fiddle with
the form.

It might not be a bad idea to throw PropertyPanel,
PropertySheet,
some explorer views and a few other assorted
NetBeans UI beans into
the form editor.  If I have the form editor
disabled, it won't hurt
anything, but when maintaining forms developed
using NB components,
it would make life a little easier.