* Follow up from this [MR](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/174464) ## What? Add backend pagination to the `oauth/applications` (now `user_settings/personal_access_tokens`) page. ## Why? Increases the page's performance ## Possible Solutions * Apply keyset pagination to the [index action ](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/controllers/oauth/applications_controller.rb#:~:text=end-,def%20set_index_vars,-%40applications%20%3D%20current_user) * Update haml markup * Add relevant tests (use render_views in the controller if no test exists for the haml file)