Do not write "import" and "push" to routing.ts if there is already absolutely the same

[IskandarovRost]

CUBA Platform version: 7.2.10
CUBA Studio plugin version: 15.0.SNAPSHOT2687-202
IntelliJ version: IntelliJ IDEA 2020.2.4 (Community Edition)
Generator version (probably) 3.1.3

See also this feature in Studio https://youtrack.haulmont.com/issue/STUDIO-8553

1. There are some entity and react-frontend component for it
2. The management-component is registered in routing.ts

import { CustomerManagement } from "./app/customer/CustomerManagement";

import { getMenuItems } from "@cuba-platform/react-core";

export const menuItems = getMenuItems();

menuItems.push({
  pathPattern: "/customerManagement/:entityId?",
  menuLink: "/customerManagement",
  component: CustomerManagement,
  caption: "CustomerManagement"
});

3. Add a new attribute to the entity
   
4. And now there is a need to add this new attribute onto the frontend
   Re-create the frontend-component*
   
5. In the frontend component wizard leave everything by default and chose to "Update frontend app model"
   Here the "add to menu" checkbox is enabled - if to disable it, there will be no problems, but it is not obvious
   
6. Start the application
   AR: npm install - fails.
   

The routing.ts is as follows

import { CustomerManagement } from "./app/customer/CustomerManagement";
import { CustomerManagement } from "./app/customer/CustomerManagement";

import { getMenuItems } from "@cuba-platform/react-core";

export const menuItems = getMenuItems();

menuItems.push({
  pathPattern: "/customerManagement/:entityId?",
  menuLink: "/customerManagement",
  component: CustomerManagement,
  caption: "CustomerManagement"
});

menuItems.push({
  pathPattern: "/customerManagement/:entityId?",
  menuLink: "/customerManagement",
  component: CustomerManagement,
  caption: "CustomerManagement"
});

ER: it seems there will absolutely no problem with the component re-creation if just not to write "the same" import to routing.xml
No need for two menu items - too, as the folder contents were rewritten.