Add new password icon for login template

app/templates/auth/login.html.j2

@@ -24,10 +24,12 @@
       <form method="POST">
         {{ form.hidden_tag() }}
         <div class="input-field">
+          <i class="material-icons prefix">email</i>
           {{ form.email(class='validate', type='email') }}
           {{ form.email.label }}
         </div>
         <div class="input-field">
+          <i class="material-icons prefix">vpn_key</i>
           {{ form.password(class='validate') }}
           {{ form.password.label }}
         </div>