[#166523992] Fix bug: Cannot open csv from URL param.
[#166523992] Fix bug: Cannot open csv from URL param.

Cherry-picked from CODAP branch
cf. https://github.com/concord-consortium/cloud-file-manager/commit/efeb6a698a262c562d29914ddf26a10d29eac5c7

concord-consortium/cloud-file-manager,concord-consortium/cloud-file-manager,concord-consortium/cloud-file-manager,concord-consortium/cloud-file-manager