Update gene search to use fields in datastore instead of searching from PANTHER API

[mugitty]

Use the following columns to search for genes:

-"ANNOVAR_ensembl_Closest_gene(intergenic_only)",
-"ANNOVAR_ensembl_Gene_ID",
-"ANNOVAR_refseq_Gene_ID",
-"ANNOVAR_refseq_Closest_gene(intergenic_only)",
-"SnpEff_ensembl_Gene_ID",

• "SnpEff_refseq_Gene_ID",
• "VEP_ensembl_Gene_ID",
• "VEP_refseq_Gene_ID",
• "enhancer_linked_genes"

[mugitty]

Restore search by gene product search. This should use the PANTHER API