Remove translation for `title` property of `FacilityGroup`.
Merge pull request #2301 from learningequality/nalanda-rct2

Nalanda rct2 into nalanda-prerelease
Merge pull request #2302 from learningequality/nalanda-rct2

bring back the old seeds for the baseline exams, as some teachers have a...
Metadata for 0.12.5 (and tweaks to old metadata)
Merge pull request #2309 from learningequality/release-0.12.0

Metadata for 0.12.5 (and tweaks to old metadata)
Handle bad cells from the mapping spreadsheet by skipping them.
Merge branch 'release-0.12.0' of github.com:learningequality/ka-lite into nalanda-rct2
Show video and exercise progress in playlist (fading based on completion).
Show sidebar progress for quiz as well, and fade text on completion.
Merge pull request #2291 from cpauya/feature/1966-Add-group-description

Remove translation for `title` property of `FacilityGroup`.
Allow teachers to perform a forced sync via web interface button.
Make AttemptLog.context_type optional to avoid sync errors on old data.
Merge branch 'nalanda-rct2' of github.com:learningequality/ka-lite into nalanda-rct2
Merge branch 'nalanda-rct2' into nalanda-prerelease
Merge pull request #2318 from learningequality/nalanda-prerelease

Nalanda prerelease to central-master