Support for additional "tracking" mode

extensions/measurement-tracking/src/index.js

@@ -0,0 +1,15 @@
+import getCommandsModule from './getCommandsModule.js';
+import getContextModule from './getContextModule.js';
+import getPanelModule from './getPanelModule.js';
+import getViewportModule from './getViewportModule.js';
+
+export default {
+  /**
+   * Only required property. Should be a unique value across all extensions.
+   */
+  id: 'org.ohif.measurement-tracking',
+  getCommandsModule,
+  getContextModule,
+  getPanelModule,
+  getViewportModule,
+};