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/components/status_list.js

@@ -25,6 +25,7 @@ export default class StatusList extends ImmutablePureComponent {
     prepend: PropTypes.node,
     emptyMessage: PropTypes.node,
     alwaysPrepend: PropTypes.bool,
+    timelineId: PropTypes.string.isRequired,
   };
 
   static defaultProps = {
@@ -70,7 +71,7 @@ export default class StatusList extends ImmutablePureComponent {
   }
 
   render () {
-    const { statusIds, featuredStatusIds, onLoadMore, ...other }  = this.props;
+    const { statusIds, featuredStatusIds, onLoadMore, timelineId, ...other }  = this.props;
     const { isLoading, isPartial } = other;
 
     if (isPartial) {
@@ -102,6 +103,7 @@ export default class StatusList extends ImmutablePureComponent {
           id={statusId}
           onMoveUp={this.handleMoveUp}
           onMoveDown={this.handleMoveDown}
+          contextType={timelineId}
         />
       ))
     ) : null;
@@ -114,6 +116,7 @@ export default class StatusList extends ImmutablePureComponent {
           featured
           onMoveUp={this.handleMoveUp}
           onMoveDown={this.handleMoveDown}
+          contextType={timelineId}
         />
       )).concat(scrollableContent);
     }