--- a/svghmi/widgets_common.ysl2	Tue Feb 02 16:39:02 2021 +0100
+++ b/svghmi/widgets_common.ysl2	Thu Feb 04 21:20:01 2021 +0100
@@ -251,6 +251,16 @@
             }
 
         }
+
+        activate_activable(eltsub) {
+            eltsub.inactive.style.display = "none";
+            eltsub.active.style.display = "";
+        }
+
+        inactivate_activable(eltsub) {
+            eltsub.active.style.display = "none";
+            eltsub.inactive.style.display = "";
+        }
     }
     ||
 }