title: WP Listbox: Scroll per list item instead of per group item
body: <p>I have a ListBox and would like to use logical scrolling (CanContentScroll=True).
  I have one to a few groups in my ListBox and each group can contain a lot of items, stacked vertically.</p>
  
  <p>When I scroll, the scrolling happens per group item, instead of per list item. In some cases I only have one big group, and then I can't scroll, even when not all items are visible.</p>
  
  <p>I know I could split up the listbox in one listbox per possible group, but I was wondering if there is a way to configure the listbox to scroll per listitem, instead of per groupitem?</p>
  
  <p>Thanks in advance!</p>