2) Activating the physical_printer_settings_id when loading from 3MF, AMF, GCode.
The physical printer is only activated if it references the printer_settings_id
loaded from the same file.
3) When loading the presets from 3MF, AMF, GCode, the "external" profiles
are no more created for profiles which differ from the local profiles
the loaded profiles reference. Instead, the referenced profile is activated
and modified with the loaded preset. If the referenced profile does not
exist, but the profile refers to a system profile with the "inherits"
fileds, the system profile is loaded and modified instead.
This works for all profiles with the exception of multi-extruder
printer with multiple filament profiles modified. In that case
the first modified filament profile will be loaded as modified,
while the other modified profiles will be loaded as "external".
This should fix
Physical printer + 3mf file, wrong preset used to generate gcode #5178
and possibly
https://github.com/prusa3d/PrusaSlicer/issues/5272
e42e25c933