OHIF-223: Add "Clear" all measurements to annotation toolbar (#1861)

* Add clear button

* Use james event

* Create new commands module to default

extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/index.js

@@ -101,9 +101,10 @@ function PanelMeasurementTableTracking({ servicesManager, extensionManager }) {
     const added = MeasurementService.EVENTS.MEASUREMENT_ADDED;
     const updated = MeasurementService.EVENTS.MEASUREMENT_UPDATED;
     const removed = MeasurementService.EVENTS.MEASUREMENT_REMOVED;
+    const cleared = MeasurementService.EVENTS.MEASUREMENTS_CLEARED;
     const subscriptions = [];
 
-    [added, updated, removed].forEach(evt => {
+    [added, updated, removed, cleared].forEach(evt => {
       subscriptions.push(
         MeasurementService.subscribe(evt, () => {
           setMeasurementsUpdated(Date.now().toString());