[Alien TTRPG] Secret Rolls scroll bar issues

So sadly, I do not have much experience with coding or editing, and the character sheets that are on GitHub do not have the option to do secret rolls. If anyone knows how to edit them so that they have an option to do hidden rolls directly from the character sheet, if possible I'd like to have it be a toggle similar to the default D&D sheet. There's also an issue with the horizontal scrollbar not appearing. Any help would be greatly appreciated.

Same thing here. I'm not Pro so I guess I can't edit character sheets but I'd very much like to hide my rolls as GM. Right now I'm actually rolling the dice on the side. I know some are duplicating their campaign and rolling in a separate window, but it would be easier just to have the right coding.