zle_highlight and yank

[Yuri D'Elia <wavexx@xxxxxxxxxx>]

Yanking text seems to ignore any setting in zle_highlight. This is
confirmed by setting zle_highlight=(none) and seeing that yank still
highlights the text in standout.

I would have expected it to respect the paste: style.

Or maybe it's a good idea that it doesn't, to differentiate between a
terminal paste and a regular one. But then again, I'd like a yank: style
in there.