Relates to: MC-268805 MC-268927 MC-269079 MC-269364 MC-269365 MC-269437 MC-269438 MC-269443 MC-269447 MC-269938 MC-269939 MC-270254 MC-270255 MC-270256 MC-270257 MC-270258 MC-270260 MC-270324 MC-270766 MC-273060 MC-275778 MC-276442

The bug

The scroll bar used when there are too many chat messages to display on screen appears to be a hardcoded graphic. It does not appear to be tied to a texture file as one would expect.

This is inconsistent with scroll bars in menu screens, which have been retexturable since 23w32a, and scroll bars in inventory screens, which have been retexturable since their introduction.

There appear to be at least two versions of the scroll bar: a blue version used most of the time, and a red version indicating unread messages.

How to fix

Introduce actual texture files for the scroll bar (ideally separate textures for the normal and unread versions).