Fix losing global quality changes when reading a 3MF with a CFFF

By using "pass" when the IndexError occured while reading the quality changes, empty quality
changes containers were added to the registry. These empty quality changes were then used as
"global" quality_changes, since the container registry was simply picking the first quality
changes instance container that had an empty extruder stack. Therefore, the correct global
quality changes (that actually had the global settings that were changed, like the support)
was just ignored in the whole process.

CURA-7549

plugins/3MFReader/ThreeMFWorkspaceReader.py

@@ -471,7 +471,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 extruder_info.intent_info = instance_container_info_dict[intent_id]
 
             if not machine_conflict and containers_found_dict["machine"]:
-                if int(position) >= len(global_stack.extrurderList):
+                if int(position) >= len(global_stack.extruderList):
                     continue
 
                 existing_extruder_stack = global_stack.extruderList[int(position)]
@@ -822,7 +822,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                         try:
                             extruder_stack = global_stack.extruderList[int(position)]
                         except IndexError:
-                            pass
+                            continue
                         intent_category = quality_changes_intent_category_per_extruder[position]
                     container = self._createNewQualityChanges(quality_changes_quality_type, intent_category, quality_changes_name, global_stack, extruder_stack)
                     container_info.container = container
@@ -887,7 +887,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                     try:
                         extruder_stack = global_stack.extruderList[int(position)]
                     except IndexError:
-                        extruder_stack = None
+                        continue
                     intent_category = quality_changes_intent_category_per_extruder[position]
                     container = self._createNewQualityChanges(quality_changes_quality_type, intent_category, quality_changes_name, global_stack, extruder_stack)
                     container_info.container = container