Finish off (most of) the visual portion of the ServiceDetail page.  I
still need to attach the interactions, including the modals, and I would
like to tool around some more with the request history panel. The
existing pane is filterable and can be paged through, and I would like
to at least get filterable done. Unfortunately, that is probably going
to involve making my own component rather than reusing the `UITable`
component.

Attach the modals to remove upstreams, reload configs, and delete the
modal to the service detail page. Still to be done is paginating and
filtering the request history in the 'Recent Requests' panel.

Limit the number of results displayed at a time to 5, and add buttons so
that the user can page through the results. Also add a quick search box
to the table. Neither the paging not the search are nearly as nice as on
the existing system; in particular, the table doesn't have the "Showing
{} from {} (filtered from {})" text on the original, and the search uses
`fuzzy`'s default implementation, which means that the results can seem
a little bit off kilter.

Involved two major changes: migrating the single-page utils code into
the package utils code, and changing how the request submission was
handled. In particular, w/r/t the latter, it had been the case that
there as an action creator in the `api/services.es6` file that was
responsible for sending remove upstreams requests. That has now been
removed, in favor of delegating to the more general action creator in
`api/requests.es6` that can handle any kind of request, and just
creating the request body at the point where it is triggered.