Create " UpdateStock() " function in DatabaseConnection.cs  and "pictureBoxUpdateButton_Click() " function in StockControl.cs
Merge branch 'Kasun' of https://github.com/Kasunucsc/MotorYardInventory into Gayan

Conflicts:
	Motor Yard inventory/Motor Yard/bin/Debug/web_inventory.accdb
	Motor Yard inventory/Motor Yard/obj/Debug/Motor Yard.csproj.FileListAbsolute.txt
Merge branch 'Gayan' of https://github.com/Kasunucsc/MotorYardInventory into Pubudu

Conflicts:
	Motor Yard inventory/Motor Yard/obj/Debug/Motor Yard.csproj.FileListAbsolute.txt