Use new view for identifying fields for `QuerySelect`'s `PreviewOption`

[labkey-susanh]

Rationale

This PR utilizes the customized view created by the new "Edit Identifying Fields" modal to populate the dropdown for QuerySelect usages.

Related Pull Requests

• https://github.com/LabKey/limsModules/pull/600
• https://github.com/LabKey/labkey-ui-premium/pull/499

Changes

• Update QueryInfo.getLookupViewColumns to look for the ~~identifyingfields~~ modal first, using properties set by XML (for now) if no such view is defined