Modifications to StockOrderPanel. Selecting a supplier sets products
combo to "" and opposite. Removing last product from CurrentOrder by
doubleclicking does not crash anymore.
Modifications to StockOrderPanel. Selecting a supplier sets products
combo to "" and opposite. Removing last product from CurrentOrder by
doubleclicking does not crash anymore.

Merge remote-tracking branch 'origin/master'

Conflicts:
	RetailSystem/Products.txt