Fix duplicate migration number
Clean up user table (bug 1058988)
Bump elasticsearch-dsl to pypi
Add bug link to in app products (bug 1052143)

- Add div ids to disambiguate notifications
- Update tests
- Add new test
Merge pull request #2471 from JaredKerim-Mozilla/1052143

    Add bug link to in app products (bug 1052143)
Remove background_color from FeedShelf model (bug 1058163)