Moved convert_digit_to_Excel_col to FUNCTIONS FILE
Added case_number = "" for error handling

For some reason, every once and a while the script seems to get "caught"
on a case and derails. Apparently, it was navigating to REPTs under a
case number. I created a case_number = "" to avoid the issue.
Fifth major change to PDTE

REVW and REVS are now live. They create an Excel list, relatively
simply. They will indicate to the user percentages of cases with N, I,
and U status. REVS also asks if you want to go to the current month + 2,
as it's one of the rare few screens that can do that.