gh-2378 enable getters for properties defined with non-strict schemas; update tests
Merge pull request #2439 from alabid/gh-2378

gh-2378 enable getters for properties defined with non-strict schemas; u...
Fix #2418: don't automatically save manually populated docs
Use _skipDepopulateTopLevel by default
Merge pull request #2443 from LearnBoost/gh-2418-2

Fix #2418: don't automatically save manually populated docs