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

* Add clear button

* Use james event

* Create new commands module to default

extensions/default/src/commandsModule.js

@@ -0,0 +1,25 @@
+const commandsModule = ({ servicesManager }) => {
+  const { MeasurementService } = servicesManager.services;
+
+  const actions = {
+    clearMeasurements: () => {
+      MeasurementService.clear();
+    },
+  };
+
+  const definitions = {
+    clearMeasurements: {
+      commandFn: actions.clearMeasurements,
+      storeContexts: [],
+      options: {},
+    },
+  };
+
+  return {
+    actions,
+    definitions,
+    defaultContext: 'DEFAULT',
+  };
+};
+
+export default commandsModule;