Ui improvements (#6198)

* PLT-6306 - Post alignment in compact view

* PLT-6266 - Adjusting spacing for files (compact)

* PLT-6302 - Margins not equal for paragraphs in post

* PLT-6332 - FIxing inline images

* PLT-6134 - Fixing border on emoji picker

* PLT-6323 - Fixing UI for system console user list

* PLT-6375 - Updating emoji picker

* PLT-6327 - Updating more channel/user list

* PLT-6241 - Adding IE detection

* PLT-6332- Fixing inline markdown images

webapp/components/channel_view.jsx

@@ -4,6 +4,7 @@
 import $ from 'jquery';
 import React from 'react';
 
+import * as UserAgent from 'utils/user_agent.jsx';
 import ChannelHeader from 'components/channel_header.jsx';
 import FileUploadOverlay from 'components/file_upload_overlay.jsx';
 import CreatePost from 'components/create_post.jsx';
@@ -40,6 +41,11 @@ export default class ChannelView extends React.Component {
         ChannelStore.addChangeListener(this.updateState);
 
         $('body').addClass('app__body');
+
+        // IE Detection
+        if (UserAgent.isInternetExplorer()) {
+            $('body').addClass('browser--ie');
+        }
     }
     componentWillUnmount() {
         ChannelStore.removeChangeListener(this.updateState);