When Tippy is delegated to the same element more than once, that
prevents the destroy method from working, which makes it so that
users cannot change the settings and then reinitialize the tooltips.
To this end, each delegate() call is now given a different selector.
Additionally, the tooltips are given their own separate <div>'s so
that something like the second delegate() call in the UserTooltips
module can be given its own unique selector.
When viewing a list of post #XXX links, like this:
* post #123
* post #456
* post #789
Then moving from bottom to top could cause multiple tooltips to appear
over one another. This was because tippy.js tries to keep tooltips
active while moving towards them, which meant it was possible to
activate a second tooltip while moving towards the first.
Fix an exception that is triggered by mousing out of a thumbnail when
tooltips are disabled. Caused by trying to access `qtip.cache` when
`qtip` is null.
* Cancel pending ajax requests when mousing out of the thumbnail.
Prevents multiple requests from piling up if the user moves in and out
of the thumbnail before the first request completes. This normally
isn't possible except during slowbooru.
* Show an error message if the ajax request fails unexpectedly.
Refactor things to store information about the current user as data
attributes on the <body> tag rather than as <meta> tags. These <meta>
tags are now deprecated and will be eventually removed.
* Store all of the current user's API attributes as data attributes on
the <body> tag.
* Add `CurrentUser.data` for getting data from the <body> tag, and
use it instead of `Utility.meta`.
* Add `CurrentUser.update` for updating the current user's settings.
* Fix a bug with the user named "Anonymous" not being able to edit notes.
