Fixed bug while editing products in products list

[sameersecond]

This PR solves #86

The following is the state of products on /admin/productlist before updating any product:

After editting any of the products the state of productDetails becomes (note that there is no product: {}) :

This causes a crash in line 47 of frontend/src/screens/ProductEditScreen.js, as product is not defined and we try to access product.name (when trying to edit any product for the second time).

if (!product.name || product._id !== productId) {
    dispatch(listProductDetails(productId))
}

Hence, all I did was update the productDetails reducer when the PRODUCT_DETAILS_RESET action is dispatched.

P.S. The above screenshots were taken using Redux DevTools web extension.

[roopeshsn]

Hi, @sameersecond Have you checked whether the error not appears after these changes?

[sameersecond]

Yes, I have checked and the error does not appear anymore.

freshbey-2022-10-09_12.15.25.mp4