title: wysihtml5 - how disable underline tag
body: <p>I have a small problem with wysihtml5 on my site. I want to allow only a few html tags and if I remove underline from parser rules and even underline command from wysihtml5 library, I can still press CTRL(command)+U to make selected text underlined. What should I do to get rid of this behaviour?
  Thanks for any advices.</p>