[css-sizing] Should we add -webkit-fill-available as an alias of stretch? #12858
Description
Blink and WebKit have had it for more than a decade.
Firefox is adding support for it in in https://bugzilla.mozilla.org/show_bug.cgi?id=1988938. Apparently it was a webcompat pain point.
I plan to enable it in Servo too.
So should we put it into the spec? https://drafts.csswg.org/css-sizing-4/#sizing-values
CC @dholbert