feat(ui): hide reset node field value button when value is unchanged

invokeai/frontend/web/src/features/nodes/components/flow/nodes/Invocation/fields/NodeFieldElementResetToInitialValueIconButton.tsx

@@ -15,6 +15,10 @@ export const NodeFieldElementResetToInitialValueIconButton = memo(({ element }:
   const { nodeId, fieldName } = data.fieldIdentifier;
   const { isValueChanged, resetToInitialValue } = useInputFieldInitialFormValue(id, nodeId, fieldName);
 
+  if (!isValueChanged) {
+    return null;
+  }
+
   return (
     <IconButton
       variant="link"