Improve getting started column (#7676)

* Adjust footer of getting started column

- Improved style
- Moved hotkeys, about this instance and logout to footer
- Removed FAQ, User Guide, Apps links
- Use hamburger icon for the column

* Add edit profile action button to profile and more to dropdown

* Add "Trending now" to getting started column

* Add preferences/security links on mobile layout

app/javascript/mastodon/components/hashtag.js

@@ -0,0 +1,41 @@
+import React from 'react';
+import { Sparklines, SparklinesCurve } from 'react-sparklines';
+import { Link } from 'react-router-dom';
+import { FormattedMessage, FormattedNumber } from 'react-intl';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+
+const shortNumberFormat = number => {
+  if (number < 1000) {
+    return <FormattedNumber value={number} />;
+  } else {
+    return <React.Fragment><FormattedNumber value={number / 1000} maximumFractionDigits={1} />K</React.Fragment>;
+  }
+};
+
+const Hashtag = ({ hashtag }) => (
+  <div className='trends__item'>
+    <div className='trends__item__name'>
+      <Link to={`/timelines/tag/${hashtag.get('name')}`}>
+        #<span>{hashtag.get('name')}</span>
+      </Link>
+
+      <FormattedMessage id='trends.count_by_accounts' defaultMessage='{count} {rawCount, plural, one {person} other {people}} talking' values={{ rawCount: hashtag.getIn(['history', 0, 'accounts']), count: <strong>{shortNumberFormat(hashtag.getIn(['history', 0, 'accounts']))}</strong> }} />
+    </div>
+
+    <div className='trends__item__current'>
+      {shortNumberFormat(hashtag.getIn(['history', 0, 'uses']))}
+    </div>
+
+    <div className='trends__item__sparkline'>
+      <Sparklines width={50} height={28} data={hashtag.get('history').reverse().map(day => day.get('uses')).toArray()}>
+        <SparklinesCurve style={{ fill: 'none' }} />
+      </Sparklines>
+    </div>
+  </div>
+);
+
+Hashtag.propTypes = {
+  hashtag: ImmutablePropTypes.map.isRequired,
+};
+
+export default Hashtag;