Programmatically moved scrollviews jump when floating panel is moved

[ffittschen]

As a follow up of the offset changes mentioned at the end of #30, this issue occurs when the content view controller is a scroll view, e.g., a UITableView which gets scrolled programmatically, e.g., by using scrollToRow(at: IndexPath, at: ScrollPosition, animated: Bool).

Expected result

Moving the floating panel, e.g., from .half to .full after using scrollToRow or similar programmatic ways to scroll a scroll view should not cause a change in the contentOffset of the scroll view.
Video

Actual result

Moving the floating panel after using programmatic ways to scroll a scroll view will set the contentOffset to contentOffsetZero causing the content to jump to the top.
Video

Note

Changing the code to achieve the expected result would also cause that manually scrolled scrollviews are not at contentOffsetZero when the floating panel is moved from .full to .half, as mentioned in #30 (comment). But this would align with the behavior of Apple's Maps and Stocks apps.

[scenee]

How about my PR #36?

[ffittschen]

Just tested it with the code that originally led me to discover this behavior: the PR works fine 👍🏻

[scenee]

Thanks, @ffittschen. I really really appreciate your report because it's much clear and helpful. I can fix it soon because of that. Thanks again