Update Count Processing logic to account correctly for back dated counts

When a count is back dated, things go awry, this ticket is to track the work done on correcting it.
We will try to detail the changes made in here, as well as find the old Customer Defects that generated this change.

Change made: ^{Added 01/12/22}

• This change applies to selecting an Apply Date for a count that is in a Past period (as defined in tbItemBalance)
  • If an Apply Date is selected, within the current period, the OnHandQty is updated in tbItemQty, along with being tracked in tbItemBalance
  • If an Apply Date is selected, that is in a prior period, the OnHandQty is NOT updated in tbItemQty. But the change is tracked in tbItemBalance
• Note: within tbItemBalance, the period runs from Monday to Sunday