feat: #1342 - Window level tab (#1429)

* WindowLevel preset code changes

* Remove localStorage code as its already being saved and some small refactor on reducer/action

* Creating unit tests for preferences reducer

* Fix cypress after class naming change

* Make hidden false as default for tab components

* Remove addUserPreferences

* Small refactor to use commandsManager from getCommandsModule instead of getting it from App.js

platform/viewer/src/appExtensions/GenericViewerCommands/index.js

@@ -2,7 +2,7 @@ import commandsModule from './commandsModule.js';
 
 export default {
   id: 'generic-viewer-commands',
-  getCommandsModule() {
-    return commandsModule;
+  getCommandsModule({ commandsManager }) {
+    return commandsModule({ commandsManager });
   },
 };