Enable simple HTML formatting in institutional consent text

[phavekes]

This issue is imported from pivotal - Originaly created at Dec 3, 2020 by Raoul Teeuwen

institutions can enter a custom text to display as consent message for users that access a SP for the 1st time. If you enter HTML, it currently is shown as unformatted text. So a HTML URL tag is shown as HTML code, the link is not clickable. We would like to offer institutions the possibility to do some simple formatting , maybe the way that is possible in in teams (Arnout: "in het beschrijving veld) maar dan niet HTML maar [b]dit soort codes[/b]".