Advanced Query Builder

[ben-fletcher]

Summary
Allow users to create custom filters to show only the data they want
Details
Some users may want very specific filters on departures. To allow this we should implement an advanced query builder that should be easy to use but also powerful.
A possible solution may be https://querybuilder.js.org/ which offers a easy to use interface.
With the following backend plugin to filter by https://github.com/castle-it/dynamic-linq-query-builder