Add race mode to game creation form

client/src/components/util/GameCreationForm/GameCreationForm.jsx

@@ -2,7 +2,7 @@ import ms from 'pretty-ms';
 import React, { useState } from 'react';
 import { createGame } from '../../../domain/apiMethods';
 import { MAP_CRUNCH, RANDOM_STREET_VIEW, URBAN } from '../../../domain/genMethods';
-import { FROZEN, NORMAL, TIME_BANK } from '../../../domain/ruleSets';
+import { FROZEN, NORMAL, TIME_BANK, RACE } from '../../../domain/ruleSets';
 import Loading from '../Loading';
 import { Dropdown, DropdownGroup, Item } from './Dropdown';
 import styles from './GameCreationForm.module.css';
@@ -56,6 +56,7 @@ export default ({ afterCreate }) => {
             <Item value={NORMAL} display='⏰' default>Normal</Item>
             <Item value={TIME_BANK} display='🏦'>Time Bank</Item>
             <Item value={FROZEN} display='❄️'>Frozen</Item>
+            <Item value={RACE} display='🏃'>Race</Item>
           </Dropdown>
         </DropdownGroup>
       </div>