Fixes#2112
It looks like this bug was accidentally introduced during a refactor in
e5ca494db8. The `bo-html` attribute was
replaced with `ng-html`, but it appears that it should actually have
used `ng-bind-html`
(https://docs.angularjs.org/api/ng/directive/ngBindHtml) because the
former is not a valid AngularJS directive.
It was also necessary to bubble up the `.cta-container` class in order to
get the appropriate styling on the title.
