::Widget::setoption is documented as the way to set the value of a megawidget option bypassing all the declare/include/changes stuff, but it is currently defined as an alias to ::Widget::configure, so that is not the case.

In my opinion it should be either deprecated and have its current behaviour documented or corrected it to perform as specified.

I'll take care of it, but will take a couple of weeks.  The ability to set an option without marking as modified seems useful, especially for megawidget's *::create function.  In any case, the modification flag can be cleared by invoking Widget::hasChanges.

I favor to documentation change.

Can you make the Documentation change ?
Just edit the html file.

Thanks,
Harald