hiding bar charts with less than 2 data bins
hiding bar charts with less than 2 data bins

Signed-off-by: Onur Sumer <s.onur.sumer@gmail.com>

Former-commit-id: 9abf603da9e91076851a0963f4676bde9db2fc9c
alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/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