BUG 8875 "ExtJS based Login & Main ProcessMaker interface" (3rd commit …)

- index reverted to its original state
- to prevent changes on already exists sites

workflow/public_html/index.html

@@ -3,6 +3,6 @@
 <title>Redirector</title>
 <meta http-equiv="PRAGMA" content="NO-CACHE" />
 <meta http-equiv="CACHE-CONTROL" content="NO-STORE" />
-<meta http-equiv="REFRESH" content="0;URL=/sys/en/uxmodern/login/login" />
+<meta http-equiv="REFRESH" content="0;URL=/sys/en/classic/login/login.html" />
 </head>
 </html>