When syncing to a different printer type only the global user changes
where kept, while the per-extruder user changes were not copied at all,
since the extruder list is empty before the new machine becomes active.
This commit fixes this problem by keeping a copy of the per-extruder
user changes before the new machine (of different type) is activated.
The copied user changes are then transfered to the new global stack
after the new machine is set as active.
CURA-6127
This should not happen, but we've seen some cases where it would cause a crash, usually
when a previous upgrade did something a bit weird (in this specific case; a printer
with an empty variant, whereas it should have a variant).
Since any change that the user will make will ensure that the variant is no longer empty (eg;
any selection of a variant will mean it's no longer empty) and that there is no way back,
it should be pretty safe to ignore the situation as it will resolve itself eventually
CURA-6992
This should not happen, but we've seen some cases where it would cause a crash, usually
when a previous upgrade did something a bit weird (in this specific case; a printer
with an empty variant, whereas it should have a variant).
Since any change that the user will make will ensure that the variant is no longer empty (eg;
any selection of a variant will mean it's no longer empty) and that there is no way back,
it should be pretty safe to ignore the situation as it will resolve itself eventually
CURA-6992
This reverts commit 27701f7653. After discussion with Nallath we've decided that it wasn't that noticeable and could temporarily display wrong names in the interface. We've decided to undo it for now.
Contributes to issue CURA-6932.
Conflicts:
cura/Machines/MaterialManager.py -> File was deleted in Master but I changed things for the lazy loading.
cura/Machines/Models/BaseMaterialsModel.py -> I clarified documentation on a line above a place where a timer was added in between.
Contributes to issue CURA-6793.
Also fix unnecessary emitting of switching extruder tabs.
This should improve performance a lot. I tested a lot of things and am convinced that it didn't break anything. But the automated GUI tests and QA team should be the final arbiters of that...
Contributes to issue CURA-6793.
Should be completely transparent. It'll fail the unit tests though because it now pretends that all printers have machine nodes.
Contributes to issue CURA-6793.
