* Tighten up illust id parsing to avoid misparsing ids from
non-illust urls (sketch urls and novel urls).
* Move id parsing tests from post_test.rb to sources/pixiv_test.rb.
* Drop support for touch.pixiv.net urls. These urls are no longer used
by Pixiv and aren't present as the source of any posts on Danbooru.
Bug: Uploading bad pixiv id images failed because the pixiv strategy
raised a BadIDError exception when the upload service checked for the
ugoira frame data.
Allow multiple pending, deleted or retired aliases/implications for the
same tag.
This is so that deleted or retired aliases can be resubmitted as new
pending requests.
* Rename `unique_id` to `tag_name`.
* Add `other_names` and `profile_urls` methods that sources can override
to provide extra names or urls when creating new artist entries.
* When creating an artist by clicking the '?' next to the artist tag in
the tag list, prefill the new artist form by finding the artist's last
upload and fetching its source data.
Previously we filled the urls with the source of the artist's last
upload, which was wrong because it was usually a direct image URL (#3078).
* Fix the other names field not escaping spaces within names to underscores.
* Fix the other names field being potentially prefilled with duplicate names.
https://danbooru.donmai.us/forum_topics/9127?page=265#forum_post_153180:
> I'm not sure how to reproduce this, but sometimes on the upload page
> when I click the button to pop out the tag box, the screen scrolls up to
> the picture but the box doesn't pop out, and I have to scroll back down
> and click it again
https://danbooru.donmai.us/forum_topics/9127?page=266#forum_post_153183:
> Yes, this was brought up by Unbreakable on Discord a while back. It's
> due to the fact that the event handler that pops out the dialog box has
> not yet been bound by the time you click it. Since that clickable
> control has an empty anchor link of "#" which goes nowhere, it therefore
> redirects the user to the top of the page.
Bug: Notes weren't rescaled when the 'final_source' field was given
during replacement.
The cause was that the notes were rescaled after the source was saved,
but saving the source clobbered `image_{width,height}_before_last_save`
inside `rescale_notes`.
Regressed in b0c2ddba.
