If the metadata changed, such as whether a material was favourite or not, then the materials models were not updating any more because the actual list of available materials was still the same.
I've removed this optimisation and tested performance locally. It seems to be slightly slower (though that might be placebo or measurement error). However most of the performance boost of cura-6016 was resulting from different changes there so the interface still seems to be quite a lot faster than what it used to be.
Contributes to issue CURA-6032.
Did this so that models can be updated more often fixing bugs where when a material is set as "not favorite" in the favorites section, its updated accordingly in its "normal" section.
It's also the ground work for saving material section expansion to preferences.
Contributes to CURA-5378
I was hoping to completely nix the generic materials model (since it's basically just a brand "Generic", but then in the QML it has to be have the same in terms of sub-menus or fold-outs and that looked stupid (Generic -> ABS -> ABS)). So we keep that one for now. It is cleaner though.
Contributes to CURA-5162, CURA-5378
when the extruder stack changes.
- What happen was that when the extruder model needed to update, the
material model was not updated correctly and so when changing a material, the
node was incorrect.
