Add the ability to override URLManager's methods

[yakhinvadim]

trafficstars

Specifically the ability to override our paramsToState and stateToParams default behavior.

Issue forked from https://github.com/elastic/search-ui/issues/790

[botelastic[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Is this issue still important to you? If so, please leave a comment and let us know. As always, thank you for your contributions.

[joemcelroy]

this has been implemented. See documentation https://docs.elastic.co/search-ui/api/core/configuration#routing-options