v8 processing message from parent window

[mwu2018]

The branch next is for the development of v8 using mobx. It lacks of message processing support that is required by this ticket.

It should be able to process the message similar to the following from a parent window and display the item in the map.

{
  "catalog": [
    {
      "name": "Credit Licence Dataset - National Map",
      "type": "magda",
      "recordId": "dist-dga-548075a1-c36e-4837-bf26-cc00567b5c23",
      "url": "https://dev.magda.io/"
    }
  ],
  "baseMapName": "Positron (Light)"
}

The above message can be sent from magda-server-client. For details, see this tickiet.

This issue might be related.

[mwu2018]

Resolved by this PR #4916