Fixed broken test cases: Defect_MAGN_190, Defect_MAGN_590, ShiftSelectAllNode, TestDeleteCommands.
Merge branch 'ChocoButter' of https://github.com/ikeough/Dynamo into ChocoButter
Merge pull request #761 from Benglin/ChocoButter

I self-merging this one because it is going to fix some broken unit test cases :)