fix(grid):Grid service wasn't being reset (#3068)

* fix(grid):Grid service wasn't being reset

* fix(service):Fix the initial service state

Services with mode specific state differed in internal state between
initial and subsequent load.  This fix address that structurally by
allows the mode to store/manage service state, but makes the
responsibility of service state central to the service.

platform/viewer/src/components/ViewportGrid.tsx

@@ -452,6 +452,7 @@ function _getViewportComponent(
     }
   }
 
+  console.log("Can't show displaySet", SOPClassHandlerId, displaySets[0]);
   UINotificationService.show({
     title: 'Viewport Not Supported Yet',
     message: `Cannot display SOPClassId of ${displaySets[0].SOPClassUID} yet`,