Merge pull request #1663 from ngokevin/statusrecurse

call save instead of update in pingback api (bug 962717)
Optimize update_addon_download_totals

There was some stale webapp data here overwriting my data. This ignores
webapps and also DELETED addons, plus avoids saving the addon when we
don't need to.
Double escape company for IARC (bug 962362)
Fixes tests broken by 968eede
show spinners when validation results are loading (bug 958219)

close #1658
Add SENTRY_DSN to stage addons settings.
rename devreg css to mkt