Added keys to array-based elements and made getMe asynchronous

web/react/components/sidebar_header.jsx

@@ -87,7 +87,8 @@ var NavbarDropdown = React.createClass({
                 }
             });
         }
-        teams.push(<li><a href={utils.getWindowLocationOrigin() + '/signup_team'}>Create a New Team</a></li>);
+        teams.push(<li key="newTeam_li"><a key="newTeam_a" href={utils.getWindowLocationOrigin() + "/signup_team" }>Create a New Team</a></li>);
+
 
         return (
             <ul className='nav navbar-nav navbar-right'>