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

Sync tooltip & popover docs

bump grunt-saucelabs to v5.1.3

Most folks shouldn't care about the shrinkwrap.
It should only be run on-demand, not as a routine/periodic thing.

Remove RTL leftovers.

versions

Fixed nested tab elements li activation

Dropdown menu in justified button-group

fixes #12211: Scrollspy: Navs in different tabs can interfere with each ...

pending the release of v3.2.0's updated hosted docs.

Fixes #13572.