The scrolling slider has been fixed in VUI+ 9.20 to accurately represent the ratio of visible/total lines in a scrollable list. This is a major UI issue in vanilla where the slider is reduced to a tiny size even if half the items are visible in the scrolling area.
During the last stages of testing, I've created a few screenshots to showcase this feature. You can see them below. You can also notice that the slider has been reconstructed so that it stretches really long, but the fading tips are stretched much less. This was improved in later versions to better match vanilla.
Settings menu
Tutorial (Help) menu - uses an alternative calculating method
Container menu - in vanilla the left slider would be cut by half, and the right would be reduced to a tiny size
Data (Quests) menu - combines both calculating methods
