[v1.1.0 ] CPDLC message without second page can be scrolled to second page, hiding content

[Likeusb]

As the title implies, getting any CPDLC message into the mailbox that does not have a second page still allows you to scroll into the second page, which hides the content of the CPDLC message.

Interestingly, it seems to be capped at 3 pages, I can click as many times down but it only takes 2 clicks to get back up to the message

The video demonstrates this in practice, but it's fairly easy to recreate

Steps:

1. Connect to a CPDLC station and await a message such as "Climb FL(XXX)" or "Proceed direct (XXX)"
2. Click the arrow buttons down
3. Click arrow buttons up
4. Observe content disappear / appear accordingly