Merge pull request #1784 from ngokevin/commbadger1

[part 1] switch reviewers app history to use comm api (bug 920746)
workaround set_iarc_storefront_data in rare case of missing version (bug 967638)
display comm attachments in reviewer tools
Revert "workaround set_iarc_storefront_data in rare case of missing version (bug 967638)"

This reverts commit 532d930a0405ed71c6b990da9b283df8e2f62d0e.
create comm notes for each review from reviewer tools