Can Quickpick Separator be displayed when scrolling down? - aka sticky separators

<!-- ⚠️⚠️ Do Not Delete This! feature_request_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Describe the feature you'd like. --> When I'm trying the new Quickpick Separator API, I find the Separator is missing when I scroll down the list. Initial state:  When scroll down:  It makes users confused when the quick pick list is long. It would be great if we could show the current separator info in the red square of the last screenshot. I'm not sure if it can be realized easily since it's a "separator" but we'd like to use it to help us group items.