Add polls

Port front-end parts of 230a012f00 to glitch-soc

app/javascript/flavours/glitch/containers/poll_container.js

@@ -0,0 +1,8 @@
+import { connect } from 'react-redux';
+import Poll from 'mastodon/components/poll';
+
+const mapStateToProps = (state, { pollId }) => ({
+  poll: state.getIn(['polls', pollId]),
+});
+
+export default connect(mapStateToProps)(Poll);