The auto resolution info is wrong in Image Source panel when add an adaptive media with 600px Max Width

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.4.13 DXP GA1, Master
• Component/s: Out of the box Fragments > Image
• Labels:
  • 7.4-known-issues
  • QA-AUTOMATION
• Fix Priority: 4
• Last Working Version:
  Master
• Git Pull Request: https://github.com/liferay-echo/liferay-portal/pull/3836
• QA Test Name:
  • LocalFile.FragmentsWithImageResolution#ViewAutoImageResolutionWhenViewportIsGreaterThanOriginalImageAndOriginalImageIsGreaterThanImageResolution
• QA Test Score: 4

Step to reproduce:

1. Applications Menu > Control Panel > Adaptive Media
2. Add a new adaptive media with 600px Max Width
3. Add a page based on Blank
4. Add an Image fragment to page
5. Click the ediable field of Image > Image Source tab
6. Upload one of attached files

Expected Results:
The value of Width should be the width of original image.

Actual Results:
The value of Width is 300px. Additionally, the value of Width is always 300px, even though change to other non-desktop viewports.

Reproduced on:
Tomcat 9.0.37 + MySQL 5.7. Portal master GIT ID: 8e83811a1c2da0bbf34610979ebe780eadbf713b.