Similar converters where removed because they clashed with the support for nullable wrappers. This adds them back as dedicated converters that does not clash with conversions for nullable wrappers.
See bd3992dfc5 (diff-96f7084777a2a702d85f5c600e542b10123d6c3332ed3d3f8e329ca7061faab0R55)
Original Pull Request: #479
Closes: #2223