Merging postreleasefix/83 to master
Merging postreleasefix/83 to master

* postreleasefix/83:
  [ENSWEB-1569] handleConfigClick method can be overridden in plugins

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