Method prepare_to_render added to Form::Fieldset
Method prepare_to_render added to Form::Fieldset

Many classes are added to different elements in the fieldset just before rendering. These are now moved to prepare_to_render method to allow calling this method when required, without actually rendering the fieldset.

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