Game, scrollbars, display the scrollbar cursor directly in its final position

[LeHerosInconnu]

Preliminary checks

• [X] I've checked that there aren't other open issues on the same topic.

Describe the problem requiring a solution

When using scrollbars, sometimes the scrollbar cursor is first positioned and then its position is adjusted. Would it be possible to display the cursor directly in its final position?

In fheroes2:

https://user-images.githubusercontent.com/43583994/158027975-fddd8b9e-c76e-4878-bb71-a0c01b11f37e.mp4

Describe the possible solution

Display the scrollbar cursor directly in its final position.

Additional info

Version 0.9.12 5071

[ihhub]

I am moving this issue to 1.0 release.