Properly updated pinned/flagged posts on deletion (#6920)

webapp/actions/post_actions.jsx

@@ -216,6 +216,12 @@ export function deletePost(channelId, post, success) {
                 data: post
             });
 
+            // Needed for search store
+            AppDispatcher.handleViewAction({
+                type: Constants.ActionTypes.REMOVE_POST,
+                post
+            });
+
             const {focusedPostId} = getState().views.channel;
             const channel = getState().entities.channels.channels[post.channel_id];
             if (post.id === focusedPostId && channel) {

webapp/actions/websocket_actions.jsx

@@ -2,6 +2,7 @@
 // See License.txt for license information.
 
 import $ from 'jquery';
+import AppDispatcher from 'dispatcher/app_dispatcher.jsx';
 
 import UserStore from 'stores/user_store.jsx';
 import TeamStore from 'stores/team_store.jsx';
@@ -265,6 +266,12 @@ function handlePostEditEvent(msg) {
 function handlePostDeleteEvent(msg) {
     const post = JSON.parse(msg.data.post);
     dispatch({type: PostTypes.POST_DELETED, data: post});
+
+    // Needed for search store
+    AppDispatcher.handleViewAction({
+        type: Constants.ActionTypes.POST_DELETED,
+        post
+    });
 }
 
 async function handleTeamAddedEvent(msg) {

webapp/components/search_results_item.jsx

@@ -21,7 +21,6 @@ import * as PostUtils from 'utils/post_utils.jsx';
 
 import Constants from 'utils/constants.jsx';
 const ActionTypes = Constants.ActionTypes;
-import {Posts} from 'mattermost-redux/constants';
 
 import React from 'react';
 import PropTypes from 'prop-types';
@@ -187,7 +186,7 @@ export default class SearchResultsItem extends React.Component {
         let message;
         let flagContent;
         let rhsControls;
-        if (post.state === Posts.POST_DELETED) {
+        if (post.state === Constants.POST_DELETED) {
             message = (
                 <p>
                     <FormattedMessage