title: Radgrid stop the ability to add new and edit a row at the same time
body: <p>On my radgrid I have inline inserting and editing.</p>
  
  <p>It is possible for the user to click "Add New" which gives them an editing template and then to click "edit" on an existing record. This results two editors being visible.</p>
  
  <p>I would like to stop the ability to edit if they are inserting data and likewise to stop the ability to insert if they are editing.</p>