Various page objects had breadcrumbs and breadcrumbFor within them, this
moves those to the existing Layout page object that contains shared page objects.
This updates the look of the search control, adds a hint about the slash
shortcut, adds highlighting of fuzzy search results, and addresses a few
edge case UX failures. It moves to using a fork of Ember Power Select
to handle an edge case where pressing escape would put the control
in an undesirable active-but-not-open state.
This introduces a DataCaches service so recently-updated collections don’t need
to be requeried within a minute, or based on the current route. It only searches
jobs and nodes. There are known bugs that will be addressed in upcoming PRs.
