Is there an example of using the spreadsheet custom editor with a kendoPopup rather than a kendoWindow? I want the editor to be shown just to side of the cell that is selected, and disappear when a user clicks a location other than the popup. I am using MVVM. Here is an example similar to my scenario. Click on the editor button next to cell A1. Notice that the popup flashes and disappears almost immediately. How to get this to work properly and be anchored to the cell that originated it?