Improve inputs in ACP setting page

[Eldenroot]

Here for this field:

One word per line would be much better as I had suggested before. Much easier for import/export.

Same for:

[effone]

I guess comma separated user ids are fine.
It is being used that way in many plugins for ages.

String list can be modified, yes.

[WildcardSearch]

I have to agree with @effone here. IDs are fine as comma-separated list. With the strings, I agree with @Eldenroot because what if the string needs to include a comma?

[Eldenroot]

OK, leave user IDs as it is now but lets discuss about the string list; one word per line and you can use whatever you want (including comma).