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/notebook/snapshot.js

@@ -49,7 +49,7 @@ export default class Snapshot {
             .then(domainObject => {
                 addNotebookEntry(this.openmct, domainObject, notebookStorage, embed);
 
-                const defaultPath = `${domainObject.name} > ${notebookStorage.section.name} > ${notebookStorage.page.name}`;
+                const defaultPath = `${domainObject.name} - ${notebookStorage.section.name} - ${notebookStorage.page.name}`;
                 const msg = `Saved to Notebook ${defaultPath}`;
                 this._showNotification(msg);
             });