TestRunner: ABORT_TESTING_AFTER_ERROR ignored for test cases added individually to testsuite

[ddffnn]

Describe the bug
If test cases are added to a test suite individually using add_test_case(..., ...) then the ABORT_TESTING_AFTER_ERROR option (or checkbox) has no effect. All the other test cases still run.

To Reproduce
Steps to reproduce the behavior:

1. Implement test case that produces error
2. Add said test case to testsuite using add_test_case(..., ...)
3. Add additional test cases
4. Enable ABORT_TESTING_AFTER_ERROR
5. Run testsuite

Expected behavior
Only the test cases preceding the error test case, and the error test case itself, should execute.

Observed behavior
All test cases added to testsuite execute.

Environment (please complete the following information):

• OS: Windows 10
• COSMOS Version 4.4.0