CC-2814: Login error messages need to be highlighted

- done
- Recaptcha box and submit button is moved to center

airtime_mvc/public/js/airtime/login/login.js

@@ -1,3 +1,6 @@
-$(document).ready(function(){
+$(window).load(function(){
     $("#username").focus()
+    
+    var captcha = $("#captcha-label").next()
+    captcha.css("padding-left", (((captcha.parents('div:eq(0)').width()-captcha.width())/2+"px")));
 })