This HTML wasn't valid because it was a <span> containing the <div
class="reply"> element and it wasn't needed because there aren't any
flag actions in proposal notifications.
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.
The little menu with the hide notification link and block user link
has been added to each proposal notification.
JS for adding the fade efect has also been added.
