I do not have a scroll wheel as I use a wacom tablet for all my pointing. Also I have your site zoomed at 110%. This means that on the layouts tab, a) “Scroll down for more” does not appear above the fold, and b) I have no means of scrolling down anyhow. As I only play modded maps that will render this version non-viable.
Please provide an alternate way to scroll down in that modal, either a clickable scrollbar or a hotkey such as PgDn or space.