I’m on it.
For scrolling it was easy: http://www.w3schools.com/cssref/pr_pos_overflow.asp
<div class="properties" style="width: 500px; height: 230px; overflow: auto;">
As for animated collapsing, I will probably need to modify the HTML as well: http://cssdeck.com/labs/css-only-showhide
Hardest part will be making the pull request.
I’m amazed at how easy it was to get my dev env up and running. I did have an issue with npm, but nothing too hard or too relevant. I’m only really struggling needing a more complete sandbox to test stuff out.
Well, I realize you wanted it to have flexible height, but now I’m convinced the height is fixed and it’s only really varying due to other parameters, and not the canvas size. I’m not so sure why updateMaxHeight is so complex. Looks like there are a whole lot of things on that layout which could be fixed. Removing it certainly doesn’t affect the abilities being grouped by item nor the branching choices, I think. I trust this PR shall pass now! 