Very odd one.  I have a grid and so long as at least one of the
columns has an Ext.form.TextField editor, edits to the grid
result in store's beforewrite, beforesave events firing.
However, if all columns Ext.form.NumberField editors, then edits
to them do not fire these store events.  I see no errors. It's
most odd.  Does anyone know what I might look at?