fix: name a content type's plain label in url_owned without translating it

A label that is not a phrase key (no ::) is used as written, so the
translator no longer logs it as a missing key.

classes/registry.go

@@ -639,11 +639,14 @@ func (s *Service) ownerOutsideRegistry(ctx context.Context, path string) (*model
 				title = l.Title
 			}
 		}
-		label := typ.Label
-		if strings.TrimSpace(label) == "" {
+		label := strings.TrimSpace(typ.Label)
+		switch {
+		case label == "":
 			label = typ.Key
+		case strings.Contains(label, "::"):
+			label = s.Phrase(label, nil)
 		}
-		return &models.Problem{Key: errPageURLOwned, Params: map[string]string{"type": s.Phrase(label, nil), "title": title}}, nil
+		return &models.Problem{Key: errPageURLOwned, Params: map[string]string{"type": label, "title": title}}, nil
 	}
 	return nil, nil
 }