Update rcmail_output_html.php

added required Attribute to Login fields

program/include/rcmail_output_html.php

@@ -1531,9 +1531,9 @@ class rcmail_output_html extends rcmail_output
         $input_action = new html_hiddenfield(array('name' => '_action', 'value' => 'login'));
         $input_tzone  = new html_hiddenfield(array('name' => '_timezone', 'id' => 'rcmlogintz', 'value' => '_default_'));
         $input_url    = new html_hiddenfield(array('name' => '_url', 'id' => 'rcmloginurl', 'value' => $url));
-        $input_user   = new html_inputfield(array('name' => '_user', 'id' => 'rcmloginuser')
+        $input_user   = new html_inputfield(array('name' => '_user', 'id' => 'rcmloginuser', 'required' => 'required')
             + $attrib + $user_attrib);
-        $input_pass   = new html_passwordfield(array('name' => '_pass', 'id' => 'rcmloginpwd')
+        $input_pass   = new html_passwordfield(array('name' => '_pass', 'id' => 'rcmloginpwd', 'required' => 'required')
             + $attrib + $pass_attrib);
         $input_host   = null;