uitable CellEditCallback executes after pushbutton callback

I am using a uitable in a GUI. When the user modifies a cell the CellEditCallback only executes after the user hits return or clicks outside of the cell. But I have a pushbutton that is used to save the contents of the table to a file. If the user selects the pushbutton after modifying a cell and before clicking anywhwere else, then the pushbutton callback executes before the CellEditCallback. This is no good because I want the CellEditCallback to check the validity of the edit before saving.

Is there a way to get the CellEditCallback to execute before the pushbutton callback?