Replace BadgeDialog innerHTML

[MrOrz]

Hi @jhk482001 ,

if the description only includes <a> and <br>, what about using linkify and nl2br in lib/text?
https://github.com/cofacts/rumors-site/blob/master/pages/article/%5Bid%5D.js#L474-L481

Originally posted by @MrOrz in #606 (comment)