Prefab Library: Does not scroll to show the new content when growing the scrollbar

[YYDan]

Description

Prefab Library does not scroll to show the new content when growing the scrollbar - you can see this in the below image, where I have expanded the last collection, the scrollbar has resized and moved, but the panel has not changed beyond the arrow orientation:

Expected Change

The Prefab Library panel is always automatically scrolled down so at least the top few items/groups in a newly-expanded section are shown

Steps To Reproduce

1. Start GM and import the attached project which contains lots of prefabs / create a new project and use Package Manager to install lots of prefabs (enough to give yourself a scrollbar in Prefab Library)
2. Expand a Prefab Collection near the bottom of the list panel
3. Observe the scrollbar will grow correctly, but you now need to scroll down yourself to see the content you wanted to view

Which version of GameMaker are you reporting this issue for?

IDE v2024.1100.0.703 Runtime v2024.1100.0.719

Which operating system(s) are you seeing the problem on?

Windows 10.0.22631.0

10b04c47-b346-4972-8956-c69d94f8da73

[jonathan-markland]

@YYDan This pull request should fix the above issue: https://github.com/YoYoGames/YoYoStudio/pull/11101

There are other things in that pull request that I noticed and just did, of interest to yourself:

• Added a Collapse Children menu option, otherwise all the expanded descendants are remembered and shown as expanded, the next time a root node is re-opened.
• Cursor up and down the tree and press ENTER to refresh the right-hand side pane