fix: Adjust redeem voucher message

src/common/pages/App/index.js

@@ -560,7 +560,7 @@ class App extends React.Component {
         <WithdrawDialog />
 
         <div className={classes.root}>
-          <AppBar position="fixed">
+          <AppBar style={{ zIndex: 1 }} position="fixed">
             <Toolbar className={classes.toolbar}>
               <div className={classes.sectionMobile}>
                 <IconButton className={classes.menuButton} color="action" aria-label="Open drawer" onClick={this.toggleDrawerNew(true)}>