Sergei / Livechat reinit without page refresh when user changes theme…

… or language (binary-com#8447)

* feat: revert back search_params

* refactor: delete comments and unused imports

packages/core/src/App/Components/Elements/LiveChat/use-livechat.ts

@@ -1,20 +1,15 @@
 import { useCallback, useEffect, useState } from 'react';
-import { useHistory, useParams } from 'react-router';
+import { useHistory } from 'react-router';
 import { liveChatInitialization } from './live-chat';
 import Cookies from 'js-cookie';
 import { deriv_urls } from '@deriv/shared';
 
-type TQueryParams = {
-    lang: string;
-    dark: string;
-};
-
 // Todo: Should break this into smaller hooks or utility functions.
 const useLiveChat = (has_cookie_account = false) => {
     const [isReady, setIsReady] = useState(false);
     const [reload, setReload] = useState(false);
     const history = useHistory();
-    const { lang, dark } = useParams<TQueryParams>();
+    const search_params = window.location.search;
     const widget = window.LiveChatWidget;
 
     const liveChatDeletion = () =>
@@ -110,7 +105,7 @@ const useLiveChat = (has_cookie_account = false) => {
 
     useEffect(() => {
         onHistoryChange();
-    }, [lang, dark, onHistoryChange]);
+    }, [search_params, onHistoryChange]);
 
     useEffect(() => {
         if (isReady && !widget) {