Python: Respect configured python aspect

Steps to reproduce:

• have kits and multiple pythons configured (best to check: normal Python == default, separate Python or Pyenv with LSP already present)
• explicitly set one of the (normal) kits to have a python with LSP
• open a normal project (not a pyproject) which also holds some python files (I've used QC for that (dumper files))
• open one of the py files and see that the file is using the default python instead of the python set inside the PythonAspect
• you may switch the python to the correct one inside the editor toolbar, but this seems to be also not to get persisted in any way as closing the project, re-opening it and the python file(s) will re-open them with the default python again