ISISNeutronMuon
[BUG] MDANSE_GUI fails to start with PyQt5 backend
Description of the error MDANSE_GUI uses qtpy, and should work with PyQt5, PyQt6, PySide2 and PySide6. However, on platforms where PyQt6 is not available and PyQt5 has to be used instead, the MolecularViewer module does not initialise correctly.
Describe the expected result The GUI should start and work the same when PyQt6 is replaced by PyQt5.
Describe the actual result
in MolecularViewer.py, line 84:
self._iren = QVTKRenderWindowInteractor(self)
argument 1 has unexpected type 'MolecularViewer'
Suggested fix If there is a way to import QVTKRenderWindowInteractor through qtpy, we should use it. Otherwise we need to check how VTK chooses which version of QVTKRenderWindowInteractor it provides.
Additional details N/A
