Leaking tooltips across tests leads to confusion and sadness.

Fixes #13696.
Fixes #13696.
Fixes #14197.
Closes #13718.

- is(':visible') seems to be the only reliable check, without a refactoring of how hoverState is used
- tests need improvement

[skip validator]

Refs #14090.
Also, fix one typo.

Generates a unique id for tooltip and adds [aria-describedby] to the element
it is called on. Resolves issue #13480

- set up test
- linted the code styles
- passed the tests
- integrated feedback from @cvrebert

primarily adds a data- attribute to the tooltip (and thus, the popover)
to create a self-reference.

#11464 - Fix JS noConflict mode - Refactor all plugins to use an internal reference to the jQuery plugin, because in noConflict mode you can never expect to be defined on the jQuery object

This reverts commit edb221a2.
Reverting due to broken JS unit tests.

Conflicts:
	docs/javascript.html