DEV: Don't use string-based actions (#33)

Author: CvX

javascripts/discourse/components/poll-banner.gjs

@@ -119,7 +119,7 @@ export default class PollBanner extends Component {
  {{htmlSafe this.cooked}}
  <DButton
  class="btn-flat"
- @action={{action "closePoll"}}
+ @action={{this.closePoll}}
  @icon="times"
  @label="share.close"
  />