Add indicator to chat list view about expired messages

[lollerfirst]

Changes for issue #1995 Added a check that prevents expired notifications from being sent Added a HBox (maybe it can be styled better) with a yellow background that is shown when there are no messages/offers

[lollerfirst]

Sorry I forgot to ask for assignment of this task but since it was a small one I hope I didn't cause annoyance. I will be requesting the assignment from now on :+1:

[HenrikJannsen]

I will add more details to the issue itself to make more clear which approach to use. The style should be less dominant and maybe be similar to the scroll-to-bottom overlay. Maybe @axpoems have some suggestion.

See here the scroll-to-bottom overlay. I think a similar approach from design and behaviour would be better.

[lollerfirst]

So like something that gets displayed whenever the user reaches the top of the scrolling?