JS API returns undefined for null string values

[mattrunyon]

Description

The JS API gives undefined instead of null for null string values.

Steps to reproduce
Run this Python snippet

from deephaven.TableTools import newTable, stringCol, charCol

source = newTable(
    stringCol("Value", "A" , "B", "C", "D", "E", "", None),
    charCol("Char", "A", "B", "C", "D", "E", " ", None)
)

Expected results

The data created in the viewport has value set to null for the last row in both columns

Actual results

Only the char column value is null. String column value is undefined.

Additional details and attachments

If applicable, add any additional screenshots, logs, or other attachments to help explain your problem.

Versions

• Deephaven: 0.8.0
• Browser: Chrome