- added Show() to GridFilter so that it can be shown initially as expanded if needed
- changed TransactionList to show the filter before populating the grid (if the filter is shown) so that user has to specify filter criteria before populating the grid. We did this since there could be a very large number of transactions if they aren't filtered first.  NOTE: this only applies if the TransactionList block isn't already filtered by something else, like a BatchId, etc.
- added "Row Limit" to TransactionList grid