Single Cell Editor
 
This extension will allow the user to change values of individual Grid cells. 
A temporary polygon theme is used to store the user selected cells and values. 
The user has the option of saving this temporary file for reference or versioning 
purposes. The values of the neighboring cells, and statistics for these, are also 
displayed and the user can select any of these values as the new value for the 
currently selected cell. The changes are stored in a new Grid and a Theme is added 
to the View.