If you have lot of serial numbers on stock and you must choose 10 serial numbers, then you have follow problem:
After choosing the entry, beas reload the window and the cursor was on the first line.
beas don't reload the list, delete only the current entry and display this on the right side.
Batchnumbers: if the available Quantity > 0 then beas reduce the available quantity (past: reload the list)
Now you can reservere / choose serial numbers and batch numbers in big lists in a better ways.
Window: issue reservation_set_master.psr