Horizontal scroll is now enabled by default in the message browser table. Removed the option to disable horizontal scroll as there is no reason to have it.
Issue: MIRTH-2818
Number columns for unprocessed rows are now italicized and shaded correctly.
Null values in the message browser are now all replaced by "--" and centered.


Issue: MIRTH-2814
MIRTH-2819: Fixed NullPointerException being thrown from SerializerFactory for data types that don't have deserialization properties (e.g. HL7v3).