[4.x]: Improve UI for Entry fields with many relations

[shifuma]

What happened?

Description

Now that the Entrification plan is underway, it would be great to see some options to better manage how an Entries field with many relations appears. This field used to be Tags, so it was much more manageable.

I understand this is something that might be coming in Craft 5, but I didn't see any mention on the blog post so I thought it was worth creating an issue.

Craft CMS version

4.4 or later

[maxstrebel]

To add to this, same is for fields with only one relation. As an idea, I could imagine that you can select a display-mode on the relation field. For example display as Tags / List / Dropdown