Kostas Karmas d5cfca4df0 Fix loading machine specific materials
The container registry was incorrectly being searched with a
variant_name == None, which always returned an empty printer-specific
materials list. As a result, the generic material settings were always
being loaded if there was no variant specifically indicated inside
the fdm_material file. The printer specific values were consistently
being ignored.

This commit fixes that by removing the search with a variant_name==None
which correctly returns the printer-specific materials list while
loading the materials from the variant nodes.

CURA-7087
2020-01-13 13:44:51 +01:00
..
2020-01-13 13:44:36 +01:00
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