fetch item prices - throttle end points with promise queue

app/components/navbar/navbar.tsx

@@ -62,6 +62,7 @@ export class Navbar extends React.Component<IProps, any> {
       <div className="navbar">
         {this.renderLeagueSelector()}
         {this.renderStashTabSelector()}
+        <button onClick={() => this.props.appStore!.resetState()}>Logout</button>
       </div>
     );
   }