Export table field size is inadequate for State/Province data values
Exporting a custom data field of type State/Province crashes with a db error "Data too long for column" if the State/Province has a long name (example: no crash with "Massachusetts", but crash with "District of Columbia"). The temporary table is created with a column size of varchar(16), presumably because the State/Province key is stored as a LONG; but the exported quantity is the value, which could be of arbitrary length (and certainly includes examples longer than 16 characters in normal usage).
This appears to be a similar issue to #181 (closed) and #877.
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