SystemTestBase into SystemTestServices lib.
Refactor test method names.
Add a stub system test for sample ui library.
Add new sample tests project. Sample tests now run.
Comment edits.
Add String.FromArray()
Merge remote-tracking branch 'origin/master' into MAGN-5402
Add shared assembly info.
Delete String.FromObject()
Add String.FromObject and String.FromArray UI nodes
Add __ToStringFromObject() and __ToStringFromArray()
Some cleanup
Clean up and fix regression
Update test cases
fixed file migrations
minor code fix
Using AstIdentifierForPreview as ScopedIf's output node
Add node description
Add search tags for nodes
Code cleanup and support parital appllication