Change dialog title in standard JA Message section

The history of all Push Notifications could be find in ‘Messages’ section (after click on hamburger menu icon). When I click on individual message in that list, the dialog window pops up. The popup title is ‘push_notification’ (body contains the message itself and there is a Done button).
Is it possible to change that title?

I’ve tried to change model name for push_notification model, but the title didn’t change.

To customize the messages section and how push notifications viewed by users, please see the answer to this question. Basically you override the default nav item by introducing a new item in the general-section of the nav.js and set its type attribute to messages.