RE: Leaving isearch-mode and keeping the highlite

[Drew Adams]

    I would find it very helpful to be able to leave isearch-mode but keep
    the highlite.... put it on C-RET or S-RET in isearch-mode-map.

Could be useful. The main question is how to later get rid of it. Perhaps
the next isearch could do that, or let isearch toggle it (see below).

Turning it on by a particular exit key sequence is not the best way. I would
rather have that be a user option (like case-fold-search), and be able to
toggle the option while in isearch (like we can toggle case-fold-search).