Perform Search Result AJAX on scroll (#950)

* Add hunt.js. Rewrite check_item_status for hunt.

* Add checkSingleItemStatusAjax.

* Check Save Statuses. Parameter fixes.

* eslint

* Rewrite checking all item statuses.

* Rewrite checking all save statuses.

* Update to Hunt 3.0.0.

* eslint

* Duplicate code reduction.

* eslint

* Remove individual functions to reduce and decrease redundancy.

* Queue up and combine AJAX requests. 200ms delay.

* Remove need for container element passing.

* Fix Javascript problems.

* Fix JS problems of elements prematurely being deleted and hiding not sticking.

* Check all statuses if Hunt not found.

* Fix save statuses.

* Fix intermittent drops and how did saved lists ever work?

* Avoid parallel item status lookups.

* Style fix.

* Add AJAX serialization to save statuses.

* Fix ajax-pending class

* eslint catch.

* Add Hunt scrolling to openurl embedding.

* eslint

* saveRunning clearing.

* Fix loading disp...