Changed: Extend '_WD_Window' function by restore option.

[sven-seyfert]

Pull request

Proposed changes

Please see Issue #514 . I described all there. Thanks.

Checklist

Put an x in the boxes that apply. If you're unsure about any of them, don't hesitate to ask. We are here to help!
This is simply a reminder of what we are going to look for before merging your code.

• [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?

Please see Issue #514 .

What is the new behavior?

Please see Issue #514 .

Influences and relationship to other functionality

Please see Issue #514 .

Additional context

Please see Issue #514 .

System under test

I tested the change on Chrome, Firefox and MSEdge.