LPS-49803 liferay-ui:icon-help shows tooltip with HTML code

Hey @natecavanaugh,

Guys from support are getting lots of these issues since the security fix against injecting html in `aui-toolip` was introduced. Does it make sense to set `html: true` to enforce backwards compatibility, or are you guys handling this in a different way, case by case? Feels like allowing html in here opens the door to the security thread again...

If we plan to keep this as is, we should at least document it in the breaking API changes, so other devs are aware of it.

/cc @sergiosanchez