Don't show datetime in chats dropdown

[Togan]

Hello!

When I'm open chats (dropdown menu) next to the teaser-content there is a date and time (teaser-timestamp timeago pull-right) of this message, but the date instantly disappears and is not visible.

[baris]

Thanks for reporting https://github.com/NodeBB/NodeBB/issues/8838

[Togan]

In chat list not showing messages preview

[julian]

@togan I believe I removed the preview there awhile back, so this is intentional