Provide a separate textures for scrollbars
Currently scrollbars do not look as in Morrowind, because Morrowind uses meshes for scrollbars instead of 2D widgets. As a result, we can not use related vanilla textures.
I suggest to make an exception and provide a separate set of textures for scrollbars and inject them to VFS. In this case modders can adjust UI replacers to make scrollbars to work properly in OpenMW.