[#49895253] Don't allow selecting cells in slickgrid because it can mess with scrolling
[#49776409] Fix 'taggings_count marked as readonly' error in worker log
Add one DB connection for workers' master
[#45300121] Add session_id for authentication
Remove explicit calls to valid?
Revert "Remove explicit calls to valid?"

This reverts commit de3160be50ca59877ad7f61fef69995a0f6581dd.
Revert "[#45300121] Add session_id for authentication"

This reverts commit 8b86e20cbd00156c6c32d1a68d5850799f26361c.
Merge branch 'master' into 2.5