Editing an existing test script does not not update location of shifted class and function 'run' icons

[chiefmyron]

When modifying an existing test script, the test locators for tests and classes already present in the file are not updated if they change location:

[chiefmyron]

Issue was caused when the user modified the namespace of the test file - did not have any logic to clean up the class from an old namespace when moving to a new one, or any logic that ensures that the new namespace actually exists.