Describe the feature you'd like
The ability for an admin to set a global value for the number of shelves to display on one page before showing the next page option.

Describe the benefits this feature would bring to BookStack users
Allow users to chose how many shelves are displayed on a single page allowing a level of customisation (personal preference is a single page with all shelves rather than breaking it up in to pages). I understand there is probably a reason on the performance aspect which led to the current number.