Get rid of outdated supported browsers list in the error page

We anyway check only for javascript and xmlhttprequest support

program/steps/utils/error.inc

@@ -25,20 +25,8 @@ $rcmail = rcmail::get_instance();
 if ($ERROR_CODE == 409) {
     $user_agent    = htmlentities($_SERVER['HTTP_USER_AGENT']);
     $__error_title = 'Your browser does not suit the requirements for this application';
-    $__error_text  = <<<EOF
-<i>Supported browsers:</i><br />
-&raquo; &nbsp;Microsoft Internet Explorer 7+<br />
-&raquo; &nbsp;Mozilla Firefox 3+<br />
-&raquo; &nbsp;Chrome 10+<br />
-&raquo; &nbsp;Safari 4+<br />
-&raquo; &nbsp;Opera 8+<br />
-<br />
-&raquo; &nbsp;JavaScript enabled<br />
-&raquo; &nbsp;Support for XMLHTTPRequest<br />
-
-<p><i>Your configuration:</i><br />
-$user_agent</p>
-EOF;
+    $__error_text  = "Required features: <i>JavaScript enabled</i> and <i>XMLHTTPRequest support</i>."
+        . "<p><i>Your configuration:</i><br>$user_agent</p>";
 }
 
 // authorization error