Linked groups can't be identified quickly

[szzze]

System Information

e.g. TrenchBroom 2024.1 on Windows 10

Expected Behavior

the bottom two groups are linked groups, the top group is just a regular group. Without selecting it they look the same, and even with selecting it, there's just an easy to miss arrow.

without selecting a group I can't see anymore if a group is a proper linked group or just a general group. In previous versions the purple group outline was a different colour and the group name had "linked" attached to it, which made it more clear.
I hope we can get some signs and feedback back. Thank you!