[OHIF-261 & OHIF-262] (#1862)

* WIP

* Reset viewport grid on mode switch.

* Make lifecyclehooks distinct from modules. Add needed SR hydration state on creation.

* Update extensions/cornerstone/src/init.js

* Remove unused REMOVE_MEASUREMENT listener.

Co-authored-by: Danny Brown <danny.ri.brown@gmail.com>

extensions/cornerstone/src/init.js

@@ -5,6 +5,7 @@ import cornerstone from 'cornerstone-core';
 import csTools from 'cornerstone-tools';
 import merge from 'lodash.merge';
 import initCornerstoneTools from './initCornerstoneTools.js';
+import cornerstoneTools from 'cornerstone-tools';
 import initWADOImageLoader from './initWADOImageLoader.js';
 import measurementServiceMappingsFactory from './utils/measurementServiceMappings/measurementServiceMappingsFactory';
 //
@@ -329,6 +330,14 @@ const _connectToolsToMeasurementService = measurementService => {
       }
     }
 
+    const { MEASUREMENTS_CLEARED } = measurementService.EVENTS;
+
+    measurementService.subscribe(MEASUREMENTS_CLEARED, () => {
+      cornerstoneTools.globalImageIdSpecificToolStateManager.restoreToolState(
+        {}
+      );
+    });
+
     const enabledElement = evt.detail.element;
     const completedEvt = csTools.EVENTS.MEASUREMENT_COMPLETED;
     const updatedEvt = csTools.EVENTS.MEASUREMENT_MODIFIED;