Show task history in the admin section (#8692)

* init task history app

* task details modal

* add simple task endpoint

* individual task display

* clean up task api based on feedback

* troubleshooting section name and urls

* Add tests for the task history endpoint and support for paging

* handle paginated endpoint response on entity list

* Add pagination to EntityListLoader, use in TaskApp

* tweak pagination ui

* Fix flow

* ui tweaks