CC-4810: Add language setting to login page

-done

airtime_mvc/public/css/styles.css

@@ -1002,6 +1002,9 @@ dt.block-display, dd.block-display {
 	font-size:14px;
 	padding: 6px 0 6px 3px;
 }
+.login-content dd select {
+    width: 100%;
+}
 .login-content dd input.ui-button, .login-content dd input.btn {
 	width:100%;
 	font-size:14px;

airtime_mvc/public/js/airtime/dashboard/dashboard.js

@@ -466,6 +466,7 @@ $(document).ready(function() {
         $.post(baseUrl+'/user/edit-user', {format: 'json', data: data}, function(data) {
             var json = $.parseJSON(data);
             $('.edit-current-user').parent().empty().append(json.html);
+            $.cookie("airtime_locale", json.locale, {path: '/'});
             setCurrentUserPseudoPassword();
             setTimeout(removeSuccessMsg, 5000);
         });

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

@@ -1,3 +1,4 @@
 $(window).load(function(){
     $("#username").focus();
-})
+    $("#locale").val($.cookie("airtime_locale"));
+});