fix/MT5 account creation issue (#7090)

* fix: fixed the issue of if all synthetic servers ared used the other market types are disabled

* fix: unable to create demo synthetic account

Co-authored-by: Matin shafiei <matin@binary.com>

Author: alamin-deriv

src/javascript/app/pages/user/metatrader/metatrader.ui.js

@@ -969,11 +969,9 @@ const MetaTraderUI = (() => {
 
         // disable next button and Synthetic option if all servers are used or unavailable
         const num_servers = populateTradingServers('real_gaming_financial');
-        if (/(real|demo)/.test(selected_acc_type) && num_servers.supported === num_servers.used + num_servers.disabled) {
+        if (/(real)/.test(selected_acc_type) && num_servers.supported === num_servers.used + num_servers.disabled) {
             disableButtonLink('.btn-next');
             $form.find('.step-2 #rbtn_gaming_financial').addClass('existed');
-            $form.find('.step-2 #rbtn_financial_financial').addClass('existed');
-            $form.find('.step-2 #rbtn_financial_financial_stp').addClass('existed');
         }
     };