Confirm Save Preview is performed if click outside of the Search Adobe Stock when File Name window is opened

[chalov-anton]

Preconditions (*)

Magento 2.3.5-alpha2 (but reproducible on all Magento versions with ASI installed)

1. Installed Magento with Adobe Stock Integration
2. Configured integration in Stores -> Configuration -> Advanced-> System -> Adobe Stock Integration fieldset

Steps to reproduce (*)

1. From Admin go to Content - Pages, click Add New Page
2. Expand Content,click Show / Hide Editor, click Insert Image...
3. Click Search Adobe Stock and select any image so that Preview is opened
4. Click Save Preview button ( Save Preview window appears. do not Confirm)
5. Move the mouse cursor to the Magento Left vertical toolbar (Dashboard, Sales, Catalog, Customer...), and perform Left mouse click

Expected result (*)

Image Preview is not saved. Nothing happens OR the Search Adobe Stock is closed, but the Image Preview is still not saved

Actual result (*)

Confirm action is performed. The image Preview is saved to the Media Gallery

[serhiyzhovnir]

The PR for fixing this issue is created for core repository: magento/magento2#27399
Thank you!