Autocomplete Mixin shows only 5 suggestions

Typeahead, which is used by the autocomplete mixin by default limits the results shown to 5.

The mixin provides no way of setting the limit parameter in typeahead.

The fix is simple, introduce a 'limit' parameter in the mixin, and in autocomplete.js do something like:

return $field.typeahead({
minLength: spec.minChars,
limit: spec.limit,
remote: {