Merge branch 'release-0.12.0' into master
Merge pull request #2537 from learningequality/release-0.12.0

Release 0.12.8
metadata for 0.12.8
Merge pull request #2742 from mrpau/hotfix/2271-Export-CSV-data-quality-issues

Hotfix/2271 export csv data quality issues
Revert "Hotfix/2271 export csv data quality issues"
Merge pull request #2747 from learningequality/revert-2742-hotfix/2271-Export-CSV-data-quality-issues

Revert "Hotfix/2271 export csv data quality issues"
Replaced Store Views confirm box gettext with sprintf
Gettext with sprintf
Merge pull request #2751 from anuragkanungo/nalanda-rct3

Replaced Store Views confirm box gettext with sprintf
Wait Box For Unit Switching
Unit Switching - Code Refactored
Updated Unit Switching Text
Merge pull request #2760 from anuragkanungo/nalanda-rct3

Wait Box For Unit Switching
Include Null in video_logs query for completion_timestamp .
Merge pull request #2762 from mrpau/hotfix/2271-Export-CSV-data-quality-issues

Hotfix/2271 export csv data quality issues.
Merge pull request #2765 from learningequality/release-0.12.0

Release 0.12.0 to nalanda-rct3
Merge remote-tracking branch 'refs/remotes/upstream/master' into release-0.12.0
metadata for 0.12.9
Fix to remove partially watched videos from result of queryset.
Merge pull request #2768 from mrpau/hotfix/2271-Export-CSV-data-quality-issues

Fix to remove partially watched videos from result of queryset.