Merge pull request #1546 from mattermost/plt-1281

PLT-1281 Make sure to have latest posts for the view when switching to a channel

web/react/components/posts_view_container.jsx

@@ -99,10 +99,12 @@ export default class PostsViewContainer extends React.Component {
         if (newIndex === -1) {
             newIndex = channels.length;
             channels.push(channelId);
-            postLists[newIndex] = this.getChannelPosts(channelId);
             atTop[newIndex] = PostStore.getVisibilityAtTop(channelId);
         }
 
+        // make sure we have the latest posts from the store
+        postLists[newIndex] = this.getChannelPosts(channelId);
+
         this.setState({
             currentChannelIndex: newIndex,
             currentLastViewed: lastViewed,