[Dillo-dev] Tooltip bugs revisited

Jorge wrote:

So far (and despite the warning inside FLTK), I've experimented with a custom tooltip handling class, and a couple custom UI widgets, that seem to work well together (i.e. solve the problem without the workaround :) ).

I see that this code is derived from the code at http://seriss.com/people/erco/fltk/#SliderTooltip I think we should mention that at the tops of the tipwin files and in AUTHORS.