Move roomname generator to React

app.js

 import JitsiMeetLogStorage from "./modules/util/JitsiMeetLogStorage";
 
 import URLProcessor from "./modules/config/URLProcessor";
-import { generateRoomWithoutSeparator } from './modules/util/RoomnameGenerator';
+import {
+    generateRoomWithoutSeparator
+} from './react/features/base/util/roomnameGenerator';
 
 import UI from "./modules/UI/UI";
 import settings from "./modules/settings/Settings";

modules/UI/UI.js

 import Profile from "./side_pannels/profile/Profile";
 import Settings from "./../settings/Settings";
 import RingOverlay from "./ring_overlay/RingOverlay";
-import { randomInt } from "../util/RandomUtil";
+import { randomInt } from "../../react/features/base/util/randomUtil";
 import UIErrors from './UIErrors';
 import { debounce } from "../util/helpers";
 

modules/UI/welcome_page/WelcomePage.js

 /* global $, interfaceConfig, APP */
 
-import { generateRoomWithoutSeparator } from '../../util/RoomnameGenerator';
+import {
+    generateRoomWithoutSeparator
+} from '../../../react/features/base/util/roomnameGenerator';
 import UIUtil from '../util/UIUtil';
 
 var animateTimeout, updateTimeout;

react/features/base/util/index.js

 export * from './loadScript';
+export * from './roomnameGenerator';

modules/util/RoomnameGenerator.js → react/features/base/util/roomnameGenerator.js

-import { randomElement } from './RandomUtil';
+import { randomElement } from './randomUtil';
 
 /*
 const _NOUN_ = [