param method to get viewconfig params moved to component
param method to get viewconfig params moved to component

This is to enable fixing the hack that saves the viewconfig for a component as hub->viewconfig and then all the calls to hub->param returns viewconfig params if no url param with the same name exists.
This behaviour has caused many bugs, so if you want to get component specific view config param, use component->param

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