[whatwg] Drop tabindex=""

[Colin Lieberman]

Gervase Markham wrote:
> Before doing that, it might make sense to consult the accessibility 
> teams of the UA vendors. In Mozilla's case, that's Aaron Leventhal. I 
> believe that there have been recent changes to this property to better 
> allow keyboard accessibility of DHTML widgets:
> http://developer.mozilla.org/en/docs/Key-navigable_custom_DHTML_widgets
>
> Gerv
>

Certainly that's reasonable. Yes, you are absolutely right insofar as FF 
goes, although I'm not 100% convinced that authors should be left in the 
driver's seat; this may be something best left 100% in the hands of UA.

Colin