Like what's done for mw-collapsible.

Proposed usage:

<div class="mw-tipsy">foobar</div> => $( ... ).tipsy()

<div class="mw-tipsy mw-tipsy-gravity-nw">foobar</div> => $( ... ).tipsy( { gravity: 'nw' } )

<div class="mw-tipsy" data-mw-tipsy-delay-in="500" data-mw-tipsy-delay-out="1000">foobar</div> => $( ... ).tipsy( { delayIn: 500, delayOut: 1000 } )

Version: 1.22.0
Severity: normal