Presentation view (#307)

* Add button to open presenter view

* Add presenter view

* Fix bug with deleting poll item

* Back to dashboard button

* Model refactoring

* Apply API changes & text fixes

* Optimize participant web socket connection

* Apply API changes: 'answer' to 'selectionOption'

* Fix null bugs with timestamps

* Fix scrollbar bug and add new scrollbar design

* Separate poll-item-create from poll-item-participant

* Upgrade to Angular 12

* Add chart to presentation mode

* Add an end screen for participants

README.md

@@ -7,8 +7,7 @@
 	<a target="_blank" href="https://github.com/livepoll/live-poll/blob/develop/.github/workflows/ci-deploy.yml"><img src="https://img.shields.io/github/workflow/status/livepoll/live-poll/Angular%20Deploy?label=Docker%20build"></a>
   <a target="_blank" href="./.github/workflows/ci.yml"><img src="https://github.com/livepoll/live-poll/workflows/Angular%20CI/badge.svg"></a>
   <a target="_blank" href="./.github/workflows/codeql-analysis.yml"><img src="https://github.com/livepoll/live-poll/actions/workflows/codeql-analysis.yml/badge.svg"></a>
-	<a target="_blank" href="https://sonarqube.live-poll.de/dashboard?id=live-poll"><img src="https://sonarqube.live-poll.de/api/project_badges/measure?project=live-poll&metric=alert_status"></a>
-  <a target="_blank" href="https://makeapullrequest.com"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg"></a>
+	<a target="_blank" href="https://makeapullrequest.com"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg"></a>
   <a target="_blank" href="./LICENSE"><img src="https://img.shields.io/github/license/livepoll/live-poll"></a>
 </p>