Scroll inventory item info by page instead by line

[irwiss]

Summary

SUMMARY: Interface "Faster scrolling of inventory item information"

Purpose of change

For an item that has a lot of information in the panel the scrolling takes several seconds as it scrolls 1 line per (whatever is unit of time for UI refresh?). This changes so one press of page up/down scrolls that information panel by a page.

Describe the solution

Calculate the page height and add/substract that instead of ++/--.

Doesn't look like scroll position needs clamping - seems it's handled as selection and clamped somewhere inside the menu routines.

Testing

Open an item with a long description, scroll down, then up, checked scrolling works as intended, repeat for short.

Additional context

Before and after; before moves down by 1 line, after by 1 page

[JeanLucVanDamme]

Nice, this is a much better default IMO.

But why not have both? Arrows up/down to scroll by line, page up/down (or whatever the binding in item info screen) to scroll by page. Like any other document.

[irwiss]

@JeanLucVanDamme

Pg up/down controls the left description panel, the arrow keys already control the menu on the right