Extract Pagination Dropdown Styles Into CSS Module

[otobot1]

Is your feature request related to a problem? Please describe.
As covered in this discussion thread, the pagination dropdown menu is being styled through global styles being applied to the body element. It would be better we used a CSS Module instead of global styles.

Describe the solution you'd like
Extract the styles into a CSS Module.

Describe alternatives you've considered
Could also address this in a similar way to item 3.ii. in this comment. It is likely that similar issues will pop up, so this approach likely won't be simple. It may be better to start using the Mantine Theme object more widely, maybe as part of migrating to Mantine v7 (#599).

Additional context
Follow-up to #723.