Code cleanup, change EngineController.HasPendingGraphSyncData to property
fix for InIdleThread flag
Merge pull request #1241 from ke-yu/fix_magn1426

Code cleanup, change EngineController.HasPendingGraphSyncData to property
Merge branch 'ChocoButter-2Become1' of https://github.com/DynamoDS/Dynamo into ChocoButter-2Become1