* Add local function to access subsets of proxies and types direct from DB.
* Add local function to access count of proxies and types direct from DB.
* Add new external function to get both proxies and types with pagination.
* Add new external function to get count of proxies and types.
* Implement pagination using page factory in JS.
* Added unit tests to cover new external functions.
* Add mod_lti behat generators and tests.
* Show first and last button in paging bar.
* Created helper class to assist with new functions.
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