Bug 947409 - Popcorn localization - missed a string
bug951484 - update webmaker-download-locales module
[#894714] No longer clean up empty layers at all.
Fix Bug 951419 - HTML5 videos with spaces in filename don't erroneously trigger error events
[#950849] Help link in project menu to link to SUMO article.
r [#930039] Ensure we can remix an unowned edit path
[#945373] Allow image urls added to media gallery input box
[#987282] Layer renaming.
r