This option was originally added in issue #1747. But only ~350 users
ever disabled autocomplete, only ~120 of these were seen in the last
year, and only 9 new users who signed up in the last year disabled it.
Users wishing to disable autocomplete can use this CSS:
.ui-autocomplete { display: none !important: }
or this Javascript:
$("[data-autocomplete]").autocomplete("disable");
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