PropertySheet item for BigDecimal adds undesired decimal separator

Issue #796 resolved
Daniel Peintner created an issue

When using PropertySheet.Item with class BigDecimal it adds immediately a dot decimal separator after adding the first character.

Let's assume a user enters "12" it turns out to be "1.02".

The reason is that after entering "1" the editor behind the scene changes the numeric value to "1.0". The expected behavior would be that the value a uses enters is not changed.