Zint - Barcode height property

[WojTec]

Please try this:

- use component instead directly
- set some 1D // Can change as in your example
- now set some 2D // Can't change
- finally set again some 1D // Still can't change

Also there is problem with border property - if you set barcode that uses it and then change to barcode that don't uses it, property has previous value.