Merge pull request #1396 from ng110/master

Allow widget actions to propagate to children

core/modules/widgets/widget.js

@@ -476,15 +476,25 @@ Widget.prototype.removeChildDomNodes = function() {
 };
 
 /*
-Invoke any action widgets that are immediate children of this widget
+Invoke any action widgets that are descendants of this widget.
 */
 Widget.prototype.invokeActions = function(event) {
+	return this.invokeActionCall(this, event);
+};
+
+/*
+Recursively search through descendants, invoking all actions encountered.
+*/
+Widget.prototype.invokeActionCall = function(here, event) {
 	var handled = false;
-	for(var t=0; t<this.children.length; t++) {
+	for(var t=0; t<here.children.length; t++) {
-		var child = this.children[t];
+		var child = here.children[t];
 		if(child.invokeAction && child.invokeAction(this,event)) {
 			handled = true;
 		}
+		if(this.invokeActionCall(child, event)) {
+			handled = true;
+		}
 	}
 	return handled;
 };