Implement History.js logic for "Cancel" action

code/controllers/CMSPageAddController.php

@@ -113,7 +113,7 @@ class CMSPageAddController extends CMSPageEditController {
 				->addExtraClass('ss-ui-action-constructive')->setAttribute('data-icon', 'accept')
 				->setUseButtonTag(true),
 			FormAction::create("doCancel", _t('CMSMain.Cancel',"Cancel"))
-				->addExtraClass('ss-ui-action-destructive')
+				->addExtraClass('ss-ui-action-destructive ss-ui-action-cancel')
 				->setUseButtonTag(true)
 		);
 		

javascript/CMSMain.AddForm.js

@@ -84,7 +84,7 @@
 				else $(this).find('input').removeAttr('disabled');
 			}
 		});
-	
+
 		$(".cms-page-add-button").entwine({
 			onclick: function(e) {
 				var tree = $('.cms-tree'), list = $('.cms-list'), parentId = 0;