The name `safe_html_with_links` was confusing and could make you think
it takes care of making the HTML safe. So I've renamed it in a way that
makes it a bit more intuitive that it expects its input to be already
sanitized.
I've changed `text_with_links` as well so now the two method names
complement each other.
Back to polls has dissapeared. A link 'Back to proposal' will be shown
instead.
The button that invites the user to take part in other polls has been
removed.
Stats will flagged as disabled when a poll for a proposal is created.
