Add explore page to web UI (#17123)

* Add explore page to web UI

* Fix not removing loaded statuses from trends on mute/block action

app/javascript/mastodon/features/explore/suggestions.js

@@ -0,0 +1,40 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import Account from 'mastodon/containers/account_container';
+import LoadingIndicator from 'mastodon/components/loading_indicator';
+import { connect } from 'react-redux';
+import { fetchSuggestions } from 'mastodon/actions/suggestions';
+
+const mapStateToProps = state => ({
+  suggestions: state.getIn(['suggestions', 'items']),
+  isLoading: state.getIn(['suggestions', 'isLoading']),
+});
+
+export default @connect(mapStateToProps)
+class Suggestions extends React.PureComponent {
+
+  static propTypes = {
+    isLoading: PropTypes.bool,
+    suggestions: ImmutablePropTypes.list,
+    dispatch: PropTypes.func.isRequired,
+  };
+
+  componentDidMount () {
+    const { dispatch } = this.props;
+    dispatch(fetchSuggestions(true));
+  }
+
+  render () {
+    const { isLoading, suggestions } = this.props;
+
+    return (
+      <div className='explore__links'>
+        {isLoading ? (<LoadingIndicator />) : suggestions.map(suggestion => (
+          <Account key={suggestion.get('account')} id={suggestion.get('account')} />
+        ))}
+      </div>
+    );
+  }
+
+}