[Applications] Adds job ad autocompletion input field to applications list filter.

(references #5196, gh-36)
[Jobs] Adds job ad autocompletion result action, routes and repository method.

(references #5196, gh-36)
[General] Updates css for typeahead / bloodhound autocompletion.

(references #5196, gh-36)
makes the search formular horizontal
[Applications] Final cleanups.

(references #5196, gh-36)
Merge branch 'feature/Applications-add_job_filter_input_field' into develop