Widow/orphan control in conversions

Hi everyone. A minor issue that's arisen in some of my recent conversions (of my own books) is widow/orphan control. I'd like to have it off, by default, so that book pages will have uniform lengths. I do have it off, by default, in Word when I format the books. But when I save to html and use Calibre to convert, the setting gets lost.

I can tweak the epub output by adding a bit of code to the CSS, but that requires hand-tweaking each conversion--a real pain if I have to go through multiple iterations to debug a book.

Is there a way to have Calibre automatically include this in the style sheet? Is it already there, and I've just missed it? If it's not there, could it be added as a checkbox in the conversion parameters?

Thanks.