Implement RackWidget::cloneSelectedModulesAction().

src/app/ModuleWidget.cpp

@@ -775,10 +775,7 @@ void ModuleWidget::cloneAction() {
 
 	// JSON serialization is the obvious way to do this
 	json_t* moduleJ = toJson();
-	// Don't use IDs from JSON
-	json_object_del(moduleJ, "id");
-	json_object_del(moduleJ, "leftModuleId");
-	json_object_del(moduleJ, "rightModuleId");
+	cleanupModuleJson(moduleJ);
 
 	// Clone Module
 	engine::Module* clonedModule = model->createModule();

src/app/RackWidget.cpp

@@ -901,7 +901,10 @@ void RackWidget::disconnectSelectedModulesAction() {
 }
 
 void RackWidget::cloneSelectedModulesAction() {
-	// TODO
+	json_t* rootJ = selectedModulesToJson();
+	DEFER({json_decref(rootJ);});
+	// TODO The Action name is incorrect here.
+	pasteJsonAction(rootJ);
 }
 
 void RackWidget::bypassSelectedModulesAction(bool bypassed) {