Add regex filters on the community timeline and the public timeline. (#3564)

* Add regex filter on the community timeline and the public timeline

* correcting

* Adjust the height of header buttons

* Remove trailing spaces

* Remove trailing spaces

* Solve some code duplication

* reset the state of the locale files in app/javascript/mastodon/locales

* adjust to upstream

* adjust to upstream

* change keys of locale settings

app/javascript/mastodon/features/home_timeline/components/setting_text.js

@@ -1,33 +0,0 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-import ImmutablePropTypes from 'react-immutable-proptypes';
-
-class SettingText extends React.PureComponent {
-
-  static propTypes = {
-    settings: ImmutablePropTypes.map.isRequired,
-    settingKey: PropTypes.array.isRequired,
-    label: PropTypes.string.isRequired,
-    onChange: PropTypes.func.isRequired,
-  };
-
-  handleChange = (e) => {
-    this.props.onChange(this.props.settingKey, e.target.value);
-  }
-
-  render () {
-    const { settings, settingKey, label } = this.props;
-
-    return (
-      <input
-        className='setting-text'
-        value={settings.getIn(settingKey)}
-        onChange={this.handleChange}
-        placeholder={label}
-      />
-    );
-  }
-
-}
-
-export default SettingText;