Button `nextColumn` parameter decrementing from 0 will freeze the program

[MaKiPL]

There's a reproducable program freeze when tweaking the nextColumn parameter on Button (and probably other controls).

1. Put button on layout
2. Scroll to nextColumn parameter. It should show 0 by default
3. Click on - to decrement the value
4. Observer the program freezing

[tpecholt]

Thanks for reporting it.