only toggle the first instance of toggleable elements - stops nested toggleables all being toggled together
only toggle the first instance of toggleable elements - stops nested toggleables all being toggled together

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode