Use Outbox dead space to show message preview

[miaulalala]

Is your feature request related to a problem? Please describe.

Currently, an outbox message doesn't have a preview and doesn't show a lot of information what the message is about in general.

Describe the solution you'd like

Use the right column dead space to show a message preview instead of opening the editing modal directly. An edit button should be shown, as should a cancel for the send.

Describe alternatives you've considered

No response

Additional context

No response