Do not save customer addresses when there are no changes

[luigifab]

Description

This PR do not save ALL customer addresses when the customer place an order.
I also change the sort order of customer addresses, last added address is displayed first.

OpenMage 20.0.13 / PHP 7.4.6, 8.0.11, 8.0.18

Manual testing scenarios

First, you need a customer with addresses.

• Add in app/code/core/Mage/Customer/Model/Address.php:

    protected function _beforeSave()
    {
        Mage::log('! _beforeSave '.$this->getId());
        return parent::_beforeSave();
    }

• Place an order, check logs.
• Apply the PR and try again.

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[colinmollenhour]

Nice work!

[kiatng]

When I tested this in backend:

            } else {
                if ($address->getParentId() != $customer->getId()) {
                    $address->setParentId($customer->getId());
                }
                Mage::getSingleton('adminhtml/session')->addNotice("is address #{$address->getId()} save?");
                if ($address->hasDataChanges()) {
                    $address->setStoreId($customer->getStoreId())
                        ->setIsCustomerSaveTransaction(true)
                        ->save();
                    Mage::getSingleton('adminhtml/session')->addSuccess("address #{$address->getId()} saved");
                } else {
                    $address->setStoreId($customer->getStoreId())
                        ->setIsCustomerSaveTransaction(true);
                }

I got this:

@luigifab Can you check?

[luigifab]

Yes this does not work on customer edit page.
Like this does not work when you save address on frontend.

[addison74]

Before merging this I would like to discuss this feature:

"I also change the sort order of customer addresses, last added address is displayed first."

What benefits it brings? What happens in customer account and in Backend? What happens in ordering form?

[luigifab]

I only changed the sort order of customer addresses collection, from asc to desc.
With that, you see last address first, like last order, last product, last comment...

[github-actions]

Unit Test Results

1 files  ±0  1 suites  ±0   0s ⏱️ ±0s
0 tests ±0  0 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
7 runs  +1  5 ✔️ +1  2 💤 +2  0 ❌  - 2 

Results for commit dfb6fe8. ± Comparison against base commit cc3eff3.