Create new right panel cards

src/components/views/right_panel/HeaderButtons.tsx

@@ -96,8 +96,7 @@ export default abstract class HeaderButtons extends React.Component<IProps, ISta
     public abstract renderButtons(): JSX.Element[];
 
     public render() {
-        // inline style as this will be swapped around in future commits
-        return <div className="mx_HeaderButtons" role="tablist">
+        return <div className="mx_HeaderButtons">
             {this.renderButtons()}
         </div>;
     }