Paper Cut - UI Layout Views/Previews Painful without Scroll Bar

UI Paper Cut for UI Layout Views/Previews without Scroll Bar

Describe the situation in which you get this paper cut.
When using various UI Layout preview menus with items to pick from it becomes very painful to navigate larger item lists without a scroll bar. Using arrow key or middle mouse scroll requires you to scroll from one side of the list to the other before beginning to scroll the window. If you pass the item you need to scroll back through the visible list again.
Some UI Layout examples of this are listed below:

Supporting Pictures and Video:
Sculpting Brush ID Preview:

Image Editor’s Image Template ID:

Supporting video:

Add scroll bar to UI Layout view/preview menus items where you get to select something from a list of options.