Now I'm aware enough to mention it.

I think, all Gadgets that can take keyboard focus should at least allow
to get a GotFocus and LostFocus event.
Among other highly desired EventTypes for [allmost] all gadgets would also be
"Changed".
(I'm thinking mostly of the EditorGadget und TreeGadget now,
because those are the ones I'm most using at the moment,
but this should not be limitted to those.
