Fixed center channel height magic. Fixes tutorial

web/react/components/center_panel.jsx

@@ -61,9 +61,7 @@ export default class CenterPanel extends React.Component {
                         <div id='channel-header'>
                             <ChannelHeader />
                         </div>
-                        <div id='post-list'>
-                            {postsContainer}
-                        </div>
+                        {postsContainer}
                         <div
                             className='post-create__container'
                             id='post-create'

web/react/components/create_post.jsx

@@ -236,8 +236,6 @@ export default class CreatePost extends React.Component {
         PostStore.storeCurrentDraft(draft);
     }
     resizePostHolder() {
-        const height = this.state.windowHeight - $(ReactDOM.findDOMNode(this.refs.topDiv)).height() - 50;
-        $('.post-list-holder-by-time').css('height', `${height}px`);
         if (this.state.windowWidth > 960) {
             $('#post_textbox').focus();
         }

web/react/components/posts_view_container.jsx

@@ -261,7 +261,7 @@ export default class PostsViewContainer extends React.Component {
         }
 
         return (
-            <div>{postListCtls}</div>
+            <div id='post-list'>{postListCtls}</div>
         );
     }
 }