Bug: ValueSort DataSource returns nothing when not configured (minor)

[iJungleboy]

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Current Behavior / Expected Behavior

The ValueSort DataSource seems to have had a bug for a long time, where it returned no data if it was not configured to sort a specific field.

The correct behavior should be to return the list unmodified.

It's a minor bug, because this DS is not usually used without configuration, so probably nobody noticed.

Your environment

• 2sxc version(s): 17.07, probably way back to v15 or v16