Issue:
Error on RadEditor focus withing RadMultiPage

To Reproduce:
1)Use updatepanel or radajaxpanel
2)Use RadTabstrip and RadMultiPage with several RadPageViews
3)Add RadEditors to all RadPageViews
4)After first page load, using the ui, click to focus in one RadEditor to see toolbar.
5)Switch Tabs 
6)Using the ui click to focus in a different RadEditor, and receive the error.

Error:
TypeError: this.view is null
}else{this.view.hide();
Teleri...8a7831e (line 19237)

Version:
Bug in product version: 2013.2.611.45
It worked in the version we were using prior: 2012.2.912.40