[Backport] Fix gallery event observer

[Den4ik]

Original PR

#21790

Description (*)

This PR fix issue of opening gallery if moving mouse to image when clicking to another element of page

Fixed Issues (if relevant)

1. [BUG] Product gallery opening by mistake #21789: [BUG] Product gallery opening by mistake

Manual testing scenarios (*)

1. Open product page
2. Click to product qty move cursor to product image and up mouse button

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

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[Karlasa]

@magento-engcom-team give me test instance

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[magento-engcom-team]

Hi @Karlasa, thank you for the review.
ENGCOM-4720 has been created to process this Pull Request

[VasylShvorak]

@magento-engcom-team give me 2.2-develop instance

[magento-engcom-team]

Hi @VasylShvorak. Thank you for your request. I'm working on Magento 2.2-develop instance for you

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Hi @VasylShvorak, here is your Magento instance.
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[VasylShvorak]

Hi @Den4ik I cannot reproduce issue #21789 on 2.2-develop

[Karlasa]

@VasylShvorak
you are correct. Looks like this issue was already fixed at the end of the last month. If you check the history

https://github.com/magento/magento2/commits/66bacdb4129b0fc7beff62f517d06fe8b4e623b7/lib/web/mage/gallery/gallery.js

commit : ENGCOM-4565: [Backport] Fix gallery full-screen triggers #21918

Will close this PR.

[m2-assistant]

Hi @Den4ik, thank you for your contribution!
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[Den4ik]

@Karlasa yep,
but are you sure that we should to have different versions on 2.3 and 2.2?

[Den4ik]

@Karlasa Also I think that organisation of checking of PR is not good. My PR was opened 25 days ago, merged later #21918

[Den4ik]

@magento-engcom-team in my opinion we should to have same version in both branches

[orlangur]

@VasylShvorak please just make sure #21789 and #21919 and other related scenarios are working after the fix.

[magento-engcom-team]

Hi @orlangur, thank you for the review.
ENGCOM-4734 has been created to process this Pull Request

[VasylShvorak]

✔️ QA passed

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