Allow HTML in full Name of Custom User Profile Fields

The full Name field (not short name) of a custom profile field currently filters out most HTML. This is undesirable as there are instances where one might need to insert HTML. For example:

Field full name: Your <abbr title="Graphic Designers of Canada">GDC</abbr> membership number

WCAG guidelines requires that the GDC acronym be expanded using the ABBR tag for accessibility reasons.