Exceeds maximum call stack size for some data

[heralden]

On the Humanmine list PL_GenomicsEngland_GenePanel:Autosomal_recessive_congenital_ichthyosis (157 genes) it will load for a while before crashing the tab due to exceeding the maximum call stack size. This is likely due to infinite recursion, but could also be the data requiring an overly high depth.

Ideally we should catch this happening and show an appropriate error before the browser crashes.