* Allow mousing over the upload limit on profile pages to show the full
formula for the upload limit calculation. In particular, show how the
upload limit multiplier is derived from the deletion confidence.
* Refactor to avoid duplicating upload limit calculations in the
presenter, as much as possible.
Bug: if the url_string had leading spaces, when it was split the
resulting array contained the empty string, which led to a validation
error when trying to save the urls.
Fixup for #3247.
When replacing a post with the same file, don't queue a deletion and
don't leave a comment or modaction. There's no need to do these things
when we're restoring a missing or corrupted image with the original file.
* Set parent IDs with `update` instead of `update_column` /
`update_all` when reparenting children. This fixes it so that new post
versions are saved and the has_children flag is set on the new parent.
* Slightly simplify logic of update_children_on_destroy: the single
child case is subsumed by the multi-child case.
Don't silently ignore attempts to remove posts from deleted pools.
Remove the restriction on removing posts from deleted pools instead (ref: #1109).
Fixes failure to remove posts from deleted pools during expungement.
* Change Post#pools to return all pools, including deleted pools. This
fixes remove_all_from_pools to remove the post from deleted pools too.
* Change other users of Post#pools to explicitly select undeleted pools.
* Only suggest the Danbooru tag with the same name if there is no
matching wiki other name. Example: if we have the Pixiv tag `Fate` and
the Danbooru tag `fate_(series)` with other name `fate`, suggest that,
not the Danbooru tag `fate`.
* Don't suggest tags that are empty or whose wiki is deleted.
* Only split tags on "/" if there are no other matches, and only for Pixiv.
* For Pixiv, only include traditional media tags in tag list, not digital media (Photoshop, SAI).
* Add some tests.
Bug: implications that were approved but that were still in the 'queued'
state were not seen as active yet, which led to the transitivity
validation passing because it didn't include queued implications.
Disallow transitive implications. If a -> b -> c already exists, don't
allow a -> c.
Caveat: if b -> c already exists, and we make a BUR for a -> b and a -> c,
the BUR validates even though a -> c is redundant. It only fails
when the BUR is approved.
