[Backport] Fix gallery full-screen triggers

[iGerchak]

Original Pull Request

#21919

Preconditions

1. Magento 2.2.7

Description (*)

We find the issue when tried to select some text or value in the text field on the product page.
When you press mouse on the text and move mouse left up to the image gallery then make mouse up, on the image, it triggers full-screen gallery opening.

Steps to reproduce:

1. Go to product page
2. Press mouse on the text (product description) and move mouse left up to the image gallery
3. Make mouse up on the big gallery image

Expected result

No full-screen gallery. Just selected text.

Actual result

Full-screen gallery.

[magento-engcom-team]

Hi @iGerchak. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me 2.2-develop instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[ihor-sviziev]

Hi @iGerchak,
Please create PR with the same changes to 2.3-develop at first

[magento-engcom-team]

Hi @ihor-sviziev, thank you for the review.
ENGCOM-4565 has been created to process this Pull Request

[VasylShvorak]

✔️ QA passed

[ghost]

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