[Win] - Refine hover effect on checkboxes

[cfogelSV]

Affected versions

• 81.0a1 (2020-08-16)

Affected platforms

• Windows 10

Steps to reproduce
pdfjs.renderInteractiveForms - enabled

1. Launch Firefox;
2. Access a PDF form with checkboxes;
3. Hover over a checkbox;
4. Click on the checkbox;

Expected result

• hover effect displayed on checkboxes;

Actual result

• current effect is an additional margin-inside box on top-left-right, increased margin on top

Additional notes:

• S4 as suggested severity, since it's a polish;
• attached screenshot with the issue;

[marco-c]

#13875 might have fixed this. @cfogelSV can you test again?

[cfogelSV]

Forwarded it to the QA team, they will look into it.

[bogdanmaris]

On the current Nightly build I still see the original extra dark in color padding inside the checkbox, only thing that's different from the build from the first comment is an extra blue colored highlight outside of the checkbox when clicking on it. So I would say that this is not fixed. @marco-c