Document why we're only returning full profiles

It's a limitation of the quality manager that would require major refactoring there to fix.

Contributes to issue CURA-4243.

cura/Settings/ProfilesModel.py

@@ -87,7 +87,7 @@ class ProfilesModel(InstanceContainersModel):
             not_supported_container = ContainerRegistry.getInstance().findContainers(id = "empty_quality")[0]
             result.append(not_supported_container)
 
-        return {item.getId():item for item in result}, {}
+        return {item.getId():item for item in result}, {} #Only return true profiles for now, no metadata. The quality manager is not able to get only metadata yet.
 
     ##  Re-computes the items in this model, and adds the layer height role.
     def _recomputeItems(self):

cura/Settings/QualityAndUserProfilesModel.py

@@ -43,4 +43,4 @@ class QualityAndUserProfilesModel(ProfilesModel):
 
         result = filtered_quality_changes
         result.update({q.getId():q for q in quality_list})
-        return result, {}
+        return result, {} #Only return true profiles for now, no metadata. The quality manager is not able to get only metadata yet.

cura/Settings/UserProfilesModel.py

@@ -52,7 +52,7 @@ class UserProfilesModel(ProfilesModel):
                                     (qc.getMetaDataEntry("extruder") == active_extruder.definition.getMetaDataEntry("quality_definition") or
                                      qc.getMetaDataEntry("extruder") == active_extruder.definition.getId())}
 
-        return filtered_quality_changes, {}
+        return filtered_quality_changes, {} #Only return true profiles for now, no metadata. The quality manager is not able to get only metadata yet.
 
     ##  Called when a container changed on an extruder stack.
     #