RAPPS app list redraw issues

RAPPS redraw issues:

1. At bottom of app list appears last item of fist list screen when scrolling down large list (e.g. Development category)
2. At bottom of app list appears scroll bar and when resize the window (e.g. Internet & Network category)
3. At right scroll bar does not drawed when switching from large list to small (e.g. Development -> Video)