Is your feature request related to a problem? Please describe.
Although middle-truncation and auto-expansion alleviate most issues with long names, allowing multi-line will be a better approach in some circumstances. Our problem is specific to the users that have long field names in Kibana.

Quoting the customer:
“This is very frustrating, here: we have a huge list of fields. Some fields you cannot see here, because all the prefixes are the same. What I have to do is see the HTML code and copy the field.”
Right now the customer goes to Stack management and look at field names there — that's quite painful for them.

Describe the solution you'd like
It'd be good to allow not to truncate at all, but instead allow multi-line options.

Desired timeline
Kibana's 8.15 would be great.