Keyword/phrase filtering (#7905)

* Add keyword filtering

    GET|POST       /api/v1/filters
    GET|PUT|DELETE /api/v1/filters/:id

- Irreversible filters can drop toots from home or notifications
- Other filters can hide toots through the client app
- Filters use a phrase valid in particular contexts, expiration

* Make sure expired filters don't get applied client-side

* Add missing API methods

* Remove "regex filter" from column settings

* Add tests

* Add test for FeedManager

* Add CustomFilter test

* Add UI for managing filters

* Add streaming API event to allow syncing filters

* Fix tests

app/javascript/mastodon/features/community_timeline/components/column_settings.js

@@ -1,15 +1,9 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import ImmutablePropTypes from 'react-immutable-proptypes';
-import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
-import SettingText from '../../../components/setting_text';
+import { injectIntl, FormattedMessage } from 'react-intl';
 import SettingToggle from '../../notifications/components/setting_toggle';
 
-const messages = defineMessages({
-  filter_regex: { id: 'home.column_settings.filter_regex', defaultMessage: 'Filter out by regular expressions' },
-  settings: { id: 'home.settings', defaultMessage: 'Column settings' },
-});
-
 @injectIntl
 export default class ColumnSettings extends React.PureComponent {
 
@@ -21,19 +15,13 @@ export default class ColumnSettings extends React.PureComponent {
   };
 
   render () {
-    const { settings, onChange, intl } = this.props;
+    const { settings, onChange } = this.props;
 
     return (
       <div>
         <div className='column-settings__row'>
           <SettingToggle settings={settings} settingPath={['other', 'onlyMedia']} onChange={onChange} label={<FormattedMessage id='community.column_settings.media_only' defaultMessage='Media Only' />} />
         </div>
-
-        <span className='column-settings__section'><FormattedMessage id='home.column_settings.advanced' defaultMessage='Advanced' /></span>
-
-        <div className='column-settings__row'>
-          <SettingText settings={settings} settingKey={['regex', 'body']} onChange={onChange} label={intl.formatMessage(messages.filter_regex)} />
-        </div>
       </div>
     );
   }