Block the wheel -> scrollTop/scrollLeft assignment when window is the instance's scrollable container.

[jansiegel]

Context

The problem in handsontable/dev-handsontable#1902 was caused by the dragToScroll logic reading window's scrollTop property, which shouldn't be defined at all.

Before this PR, the wheel event was translated into deltas that were supposed to be assigned to the scrollable container's scrollTop/scrollLeft properties. In cases of window-scrolled instances, it resulted in the window's scrollTop/scrollLeft properties having NaN as a value, which messed up the dragToScroll logic.

After this change, the logic remains the same for container-scrolled instances, but window-scrolled instances ignore that.

How has this been tested?

Added a test case checking if triggering the wheel event on the instance results in attempts to assign scrollTop/scrollLeft properties of window.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature or improvement (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Additional language file or change to the existing one (translations)

Related issue(s):

1. handsontable/dev-handsontable#1902

Affected project(s):

• handsontable
• @handsontable/angular
• @handsontable/react
• @handsontable/vue
• @handsontable/vue3

Checklist:

• I have reviewed the guidelines about Contributing to Handsontable and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement
• My change requires a change to the documentation.