Improve support for reloading module about slicer HOT 4 OPEN

Reloading of the module may be directly done in qSlicerScriptedLoadableModuleWidget by using PyImport_ReloadModule()¹²

from slicer.

Bite that when the module has an internal Python package in a subfolder (...Lib) then we modify the reload function to reload that package, too. If there are closely related modules then we also reload those. Order of reload seems to matter, too (if we reload in incorrect order the we need to reload multiple times). It would be nice if these would work with the new reload solution.

from slicer.

+1 for a more robust and comprehensive reload procedure.

from slicer.

I introduced the qSlicerScriptedLoadableModuleWidget::reload¹ function through #7351 anticipating we would indeed improve the approach.

For now, it addresses the original issue. Once the release is done, I will look into a more robust approach.

from slicer.