[css3-ui] Reinstating appearance: none

Can we get appearance: none added back into the css3 ui specs?

Is it something that we should just accept as a vendor-specific hack 
instead?
We are kind of stuck with -webkit-appearance: none;

http://dev.w3.org/csswg/css3-ui/#changes-list 
<http://dev.w3.org/csswg/css3-ui/>


-Charles