I encountered this bug trying to use the IHEInvokeImageDisplay API in order to render multiple DICOM
studies in the viewer. Unfortunately, the component was no longer working and required some changes
in order to access the query parameters used in the API. These changes update the component to use
react router to access the query parameters and pass them to ConnectedViewerRetrieveStudyData as
appropriate. The move from ViewerRetrieveStudyData to ConnectedViewerRetrieveStudyData was necessary
in order to access the active server from the redux store. I also made a change from a series of if
clauses to a switch statement as it seemed a little more appropriate given the nature of the code
paths. Happy to change that back if needed. The PATIENT and default paths were not fixed as a part
of this work because we'll need a way to pass the filter in to the StudyList component.
