LT-66 Import DICOM Studies

- Add a toolbar in the top of worklist
- Add Import button in the worklist toolbar
- Upload all files in the selected folder to import from client to server
- Import uploaded files via DIMSE
- Delete uploaded files from server when import is completed
- Handle import status in client
- Show/Update progress dialog in client while uploading and importing files
- Show Import button only if import is supported for the default service type (DICOMWeb is currently not supported)

Packages/viewerbase/client/collections.js

@@ -2,3 +2,5 @@ ViewerStudies = new Meteor.Collection(null);
 ViewerStudies._debugName = 'ViewerStudies';
 
 ClientId = Random.id();
+
+Meteor.subscribe('studyImportStatus');