Changed statistics to show usernames with an email tooltip

web/react/components/time_since.jsx

@@ -1,6 +1,7 @@
 // Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
+import Constants from '../utils/constants.jsx';
 import * as Utils from '../utils/utils.jsx';
 
 var Tooltip = ReactBootstrap.Tooltip;
@@ -30,7 +31,7 @@ export default class TimeSince extends React.Component {
 
         return (
             <OverlayTrigger
-                delayShow={400}
+                delayShow={Constants.OVERLAY_TIME_DELAY}
                 placement='top'
                 overlay={tooltip}
             >