* Group URLs by site.
* List most important URLs first and dead URLs last.
* Add site icons next to URLs.
* Put other names and group name beneath the artist name, instead of beneath the wiki.
Remove the list of most-used source domains from artist summaries. This
took up a lot of space and usually wasn't very useful. It was also slow.
We had to calculate this on every artist tag search so we could display
it in the Artist tab, even though usually the user didn't open the tab.
* Link other names to artist searches instead of to the new artist page.
* Remove the asterisk next to other names indicating the name isn't used
as the primary name of another artist. This is almost always the case.
Allow all users to view and edit artist entries and wiki pages belonging
to banned artists. There was little need to hide these pages from
Members, it was mainly to appease artists who didn't like us even
linking to their sites.
These restrictions also had multiple flaws:
* Banned artist information was still visible in the API.
* It was still possible to edit banned artists using the API.
* It was still possible for unprivileged users to revert banned
artist entries or wiki pages to previous versions.
* The restrictions were inconsistent: in various places they were
either Member-only, Gold-only, or Builder-only.
* `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.
