isolated_by menu not working

[cbarcl01]

From Emil:

The isolated_by field currently takes a string. However, the same field in the excel template is limited to its own isolated_by menu. This presumably should be incorporated here as well.

There appears to be an isolated_by menu in the corresponding YAML. I might suggest that, instead of having its own menu, this field take the same menu as sample_collected_by.

Original details found in issue 15 on PGP