_WD_FrameList - added Frame visibility info

[mlipok]

Pull request

Proposed changes

_WD_FrameList should return information about visibility of the frame

for example: https://stackoverflow.com/questions/19669786/check-if-element-is-visible-in-dom

Checklist

• [x] I have read and noticed the CODE OF CONDUCT document
• [x] I have read and noticed the CONTRIBUTING document
• [ ] I have added necessary documentation or screenshots (if appropriate)

Types of changes

Please check x the type of change your PR introduces:

• [ ] Bugfix (change which fixes an issue)
• [x] Feature (change which adds functionality)
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (functional, structural)
• [ ] Documentation content changes
• [ ] Other (please describe)

What is the current behavior?

No information about FrameVisibility

What is the new behavior?

added _WD_FRAMELIST_FrameVisibility and new column IsHidden to the resulted array

Additional context

was discussed here: https://github.com/Danp2/au3WebDriver/issues/388

System under test

not relatead