Call onAction when clicking ParamWidgets.

src/app/ParamWidget.cpp

@@ -147,6 +147,11 @@ void ParamWidget::onButton(const event::Button &e) {
 		if (paramQuantity) {
 			APP->scene->rack->touchedParam = this;
 		}
+
+		// Call onAction
+		event::Action eAction;
+		onAction(eAction);
+
 		e.consume(this);
 	}