I registered a similar complaint a long time ago regarding the backpack and recipe windows. Like "yeah, buy default theres no scroll bar.... but if a modded game makes the backpack larger or the recipes have more than 5 ingredients, then just have it scroll."
but, i got no answer. Some windows scroll/page (like adding more recipes) and for some reason others do not and honestly "adding the ability to scroll windows when the ability to mod is supported" seems like a no brainer to keep the UI flexible (when modded) as well as maintain its standard look/feel.