Treat survival default style opts immutable
Treat survival default style opts immutable

Solve the issue that legend location is not depending on plot width

Signed-off-by: Hongxin Zhang <hongxin@cbio.mskcc.org>

Former-commit-id: 023d08d44c8e52915a10e39412dd276a2c8af843
cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend