console: refactor to ES6 class
This is WIP.
Made as a response to @benjamingr suggesting a refactoring of console.js to a class in issue #4880
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This is WIP.
Made as a response to @benjamingr suggesting a refactoring of console.js to a class in issue #4880