Add support for switching between backend PACS imaging servers

OHIF v1.0 provided support for switching between server instances in the UI. OHIF v2.0 does not appear to support this functionality. One of the core requirements for Sonador is the ability to support multiple imaging backends (for example a "dropbox", a "processing", and an "archive").

While these backends can all be added to a list of servers, and OHIF will parse and load the associated data for the first, there is no way to change between the servers. Some type of dropdown Server Management UI is needed to allow for switching between the different instance in the list.

Interface for managing servers in OHIF v1.0:

• Documentation link: https://docs.ohif.org/history/v1/lesion-tracker/server-management.html

Tasks:

• Verify if multiple servers are already supported, if so, add additional configuration or other markup required to enable.
• If multiple servers not supported, open issue with OHIF upstream
• Create basic plugin that allows for the user to load a basic server list and switch between the active view and the other servers