fixed incorrect import of onMobxPromise in Download Tab (fix https://sentry.io/memorial-sloan-kettering/spa-prod/issues/747688976/)
fixed incorrect import of onMobxPromise in Download Tab (fix https://sentry.io/memorial-sloan-kettering/spa-prod/issues/747688976/)

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

Former-commit-id: 7193bfe1558e1b17a08b217e223f07790362b1f2
alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/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