Open new teams in new tab

web/react/components/sidebar_header.jsx

@@ -85,7 +85,7 @@ var NavbarDropdown = React.createClass({
                 }
             });
         }
-        teams.push(<li key='newTeam_li'><a key='newTeam_a' href={utils.getWindowLocationOrigin() + '/signup_team' }>Create a New Team</a></li>);
+        teams.push(<li key='newTeam_li'><a key='newTeam_a' target="_blank" href={utils.getWindowLocationOrigin() + '/signup_team' }>Create a New Team</a></li>);
 
         return (
             <ul className='nav navbar-nav navbar-right'>