You can use the implementation from the following demo to achieve your goal: http://dojo.telerik.com/aVUw/2 Note that you should be able to extend it further to dynamically customize the items in the context menu based on the clicked row data (cell text or row id, for instance).
This is a required feature for our customers as well. Please add this in.
This is our number 1 customer request. Can you add it in?