Mark base state field name as dirty

[johnwduggan]

Summary of Changes

Very minor bug fix to use the correct name when flushing state variables. The automated testing doesn't detect this since it manually flushes after state changes.

Also, with state being flushed properly, there was an issue with state leaking between each instance of test_binding_trame_to_model since each run was binding to test_object, producing confusing results. I've added an index into each connection name to better isolate each test.

Checklist

• The PR has a clear and concise title
• Code is self-documented and follows style guidelines.
• Automated tests are written and pass successfully.
• Regression tests (e.g. manually triggered system tests, manual GUI/tool tests, ...) are performed to make sure the PR does not break anything (when applicable)
• Readme file is present and up-to-date.

Documentation Updates

Additional Notes