In production the name input is really big because the artist name
column in the production db is `text` rather than `character varying`,
and simpleform treats text columns as textbox inputs.
Instead of having custom code check whether the artist name is already
in use, just enable autocomplete on the artist name field. This is an
easier and more robust way to indicate tag name conflicts.
Drop support for the following pseudo-metatags in the Name field in the
artists search form:
* name:<name>
* other:<other name>
* group:<group name>
* status:banned
* status:active
* http://www.example.com
Instead, make the Name field do a wildcard search against the artist
name, group name, or other names. If the query looks like `/regex/`,
then do a regex search against any of these names.
/artists?search[name] now does a literal exact match and
/artists?search{any_name_matches] does the above wildcard/regex search.
* `legacy_normalize` came from c6012535, which is no longer a problem.
* `normalize_for_search` is only used for "[mass edit]" links
in artist entries. These links are a shortcut for performing a
`-artist_name source:<artist_url> -> artist_name` mass edit to tag
untagged artists, but this won't work for most sites these days.
* Fix the artist URLs field not being prefilled when clicking
"Create new artist" in the "Fetch source data" box.
* Fix the artist name field not being prefilled when clicking
"Create new artist entry" on the /artists/show_or_new?name=<name> page.
* Move all autocomplete code to autocomplete.js.
* Mark autocompleted fields with `data-autocomplete="<type>"` attributes,
instead of hardcoding input field IDs in the javascript.
* Fix access denied error when anonymous users open /artists/show_or_new.
* When the artist doesn't exist, take user to "artist doesn't exist"
page instead of redirecting to /artists/new.
* Add search[order]=post_count param to /artists.
* Make autocomplete do a prefix match ordered by post count, so that it
works the same way that tag autocomplete does elsewhere.
