Partly resolves "Implement state copy in AST"

eraser-base/src/main/jastadd/Item.jrag

 aspect ItemHandling {
 
-  protected boolean Item.isFrozen = false;
-  public void Item.freeze() { isFrozen = true; }
-  public void Item.unfreeze() { isFrozen = false; }
-  public final boolean Item.isFrozen() { return isFrozen; }
-
   protected boolean Item.sendState = true;
   public void Item.disableSendState() { sendState = false; }
   public void Item.enableSendState() { sendState = true; }
@@ -254,31 +249,31 @@ aspect ItemHandling {
 
   //--- setState(value,shouldSendState) ---
   public void ItemWithBooleanState.setState(boolean value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void ItemWithStringState.setState(String value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void ItemWithDoubleState.setState(double value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void ColorItem.setState(TupleHSB value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void DateTimeItem.setState(Instant value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
@@ -405,6 +400,7 @@ aspect ItemHandling {
     SetStateFromTriggeringItemAction action = new SetStateFromTriggeringItemAction();
     action.setAffectedItem(controlledItem);
     rule.addAction(action);
+    rule.activateFor(controllerItem);
     
     return rule;
     
@@ -437,14 +433,10 @@ aspect ItemHandling {
   public abstract void ItemUpdate.apply();
   public void ItemUpdateColor.apply() {
     getItem().setStateFromColor(getNewHSB());
-    getItem().freeze();
-    getItem().unfreeze();
   }
   //--- ItemUpdate.apply ---
   public void ItemUpdateDouble.apply() {
     getItem().setStateFromDouble(getNewValue());
-    getItem().freeze();
-    getItem().unfreeze();
   }
 
   //--- ItemUpdate.describe ---