rewrite to allow height wrappers to be added on update, and to tidy (functional difference is actually a lot smaller than the diff to the previous version)
rewrite to allow height wrappers to be added on update, and to tidy (functional difference is actually a lot smaller than the diff to the previous version)

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