[ACA-1928] e2e improvements - part1 (#883)

* refactor Mark as favourite tests
rename method to be more clear
create separate methods for some checks and actions

* forgot some changes

* refactor delete-undo tests

* some more refactoring

* fix

e2e/components/header/header.ts

@@ -54,5 +54,9 @@ export class Header extends Component {
     await this.moreActions.click();
     await this.menu.waitForMenuToOpen();
   }
+
+  async isSignOutDisplayed() {
+    return await this.userInfo.menu.isMenuItemPresent('Sign out');
+  }
 }