* 2.6:
Error out when trying to import a profile witha quality_type we dont have
Add default for colour code of material
When trying to convert None to RGBA, log it and return a usable default
Rather than successfully importing the profile and then not showing
anything, we now display an error. Not the perfect solution but the
easiest for now.
Contributes to #1873
Another small bug I found when looking through this MachineManager code. My IDE was complaining that the preferred_material_name was not always initialised and that preferred_material was an unused variable.
Doesn't contribute to issue CURA-3803.
These may have different parameters, such as which machine and extruder they are updating the material and variant of. If we only pass the last signal on, then we're missing the update of other extruders.
Contributes to issue CURA-3803.
We know now that it must be a Cura Container Stack. This should be a bit faster, and makes the error message I was getting a bit more clear.
Contributes to issue CURA-3803.
Not just the active extruder. The non-active extruder may change when loading a project file which happened to have the same printer (so no new printer is created) and the same material and variant in the active extruder but not the same material or variant in another extruder.
Contributes to issue CURA-3803.
It may also be any other class that implements the Definition Container Interface.
Not really related to CURA-3803 but I'm putting it there anyway as I found it during that development.
Otherwise we may only change one of the extruders next time, and it'll still have the other change in this dictionary from the previous time we are syncing from the printer.
Contributes to issue CURA-3788.
Instead of cloning the 2.85 mm generic PLA material and setting its diameter, we now clone the generic PLA with the same diameter as the current machine. This will also clone all the machine-specific settings included in that base file.
We do not load the extruders in a fixed order, thus we cannot assume
that addExtruder is called in the right order. This means that index 0
of the extruders is not necessarily the extruder with position 0. So
instead, use the extruder position as a dict key.
Contributes to CURA-3738
