Three Dot Menu Prototype (#3325)

* Three dot menu implementation

Co-authored-by: Deep Tailor <deep.j.tailor@nasa.gov>
Co-authored-by: Nikhil <nikhil.k.mandlik@nasa.gov>

src/plugins/newFolderAction/newFolderAction.js

@@ -28,6 +28,8 @@ export default class NewFolderAction {
         this.key = 'newFolder';
         this.description = 'Create a new folder';
         this.cssClass = 'icon-folder-new';
+        this.group = "action";
+        this.priority = 9;
 
         this._openmct = openmct;
         this._dialogForm = {