Add Status Indicators of Service Status

rhooper[CodePlex]
We need to add service indicators at various stages of the search algorithm.

When HD is launched, HIS Central should be pinged to make sure it is alive before user takes the time to define a search. (Red Light/Green Light)

After search results are returned, each of the identified services should be pinged to assess their status so the user knows the service is available before launching download.

Start by tracing the desktop application's launch, search-results, and download flows to find where service checks and status indicators would fit. Done means HIS Central is checked at launch and identified services are checked after results return, with clear red/green availability indicators before the user proceeds.

Written by the indexing model from the issue text.