Enhance usability of Advanced option for mathBlock

### Problem description
Currently, in the mathBlock test runs outputs section is shown before the code is executed, which leads in some cases to the output values in the UI section to appear as empty, while they are really not empty - in JSON view the actual results can be viewed. This can lead to confusion.

https://github.com/user-attachments/assets/73e2d600-5dc2-4746-b43a-6fb3bda8eda2

### Requirements
The the outputs section should be calculated and shown after the code is executed, or be updated immediately after execution with correct results.

### Definition of done
Outputs section always displays the results if/when they are available
Runs with the test data attached below demonstrate correct behaviour as per requirements above

[Test data to reproduce.txt](https://github.com/user-attachments/files/24966827/Test.data.to.reproduce.txt)

### Acceptance criteria

- The results in the Outputs sections in the UI and JSON view are synchronised and always display results if available.