F2 key will not begin edit mode again in focused cell after ending editing with ESC key

[rtavassoli]

When in edit mode and leaving it with the ESC key, it is not possible to reenter edit mode in the same cell with the F2 key (I am using the grid with enableCellEditOnFocus: true). You have to navigate to another cell and then back to the cell to enter edit mode again - or click in it with the mouse.