[Bug] Messages not shown in fullscreen apps

[VirtualEvan]

Steps to reproduce

1. Define an app as full screen

   {
     name: 'draw-io-edit',
     path: '/edit/:filePath',
     components: {
       fullscreen: DrawIoEditor
     },
     meta: { hideHeadbar: true }
   }

2. Use the showMessage function

The message is shown if the fullscreen property is changed to app and hideHeadbar is removed

{
  name: 'draw-io-edit',
  path: '/edit/:filePath',
  components: {
    app: DrawIoEditor
  }
}

Expected behaviour

The speified message should be shown

Actual behaviour

The message is not displayed

[pascalwengerter]

Hey @VirtualEvan, is this issue still open after your PR has been merged? :)

[VirtualEvan]

Yes, this issue is something I found while working in the draw.io app, my PR did not address it

[kulmann]

Apps are now always forced into an application layout which contains the message-bar component and handles the active messages. The fullscreen mode has been removed entirely in #6401 - closing this issue here as solved.