Fix Gene page "export to CSV" genetic ancestry group data values

On the gene page, users can download the information present in the variant table to a CSV file for local usage. With the release of v4, this CSV file contained faulty counts for AC, AN, AF, and Number of Homozygotes for certain genetic ancestry groups. When adding up the exome and genome counts for a given variant, differing indexes of genetic ancestry groups in a list resulted in the browser incorrectly combining counts for different groups.

This has now been corrected, and any CSV file downloaded from a v4 gene page before this was patched (Dec 01, 2023) should be re-downloaded to ensure users have the proper data.