Remove trailing whitespace from Python files

cura/Machines/QualityGroup.py

@@ -12,7 +12,7 @@ from cura.Machines.ContainerNode import ContainerNode
 class QualityGroup:
     """A QualityGroup represents a group of quality containers that must be applied to each ContainerStack when it's
     used.
-    
+
     A concrete example: When there are two extruders and the user selects the quality type "normal", this quality
     type must be applied to all stacks in a machine, although each stack can have different containers. So one global
     profile gets put on the global stack and one extruder profile gets put on each extruder stack. This quality group
@@ -24,7 +24,7 @@ class QualityGroup:
         - um3_global_normal
         - um3_aa04_pla_normal
         - um3_aa04_abs_normal
-    
+
     The purpose of these quality groups is to group the containers that can be applied to a configuration,
     so that when a quality level is selected, the container can directly be applied to each stack instead of looking
     them up again.
@@ -32,7 +32,7 @@ class QualityGroup:
 
     def __init__(self, name: str, quality_type: str) -> None:
         """Constructs a new group.
-        
+
         :param name: The user-visible name for the group.
         :param quality_type: The quality level that each profile in this group has.
         """