Improve "New policy" title in breadcrumb

Problem

Currently no matter which policy user create, we will show the same title in editing page: **New Policy**, it would be a better experience if we added the policy type, so that it is more clear which policy type is being created.

the breadcrumbs are set in the group and project new.html.haml with the policy type being selected on the frontend. I currently don't know how we would update the breadcrumb from the frontend