Make admin panel tables sortable and filterable

[hakasapl]

Sortable by clicking on the header, filterable by applying filters. Filters and sorts should be GET vars in the url so they can be bookmarked.

[hakasapl]

Clicking on column headers should sort by that column & update the url.

Example: If you click on UID, url updates to <OLD URL>?sort=id

The filters should be a separate button on the top where you can select users/PIs by organization