LDAP group map multiline support

[codefritzel]

Feature Description

With more than one group mapping, the single-line text field can quickly become very confusing. How about replacing the input text field with a multiline textarea?

This would make it easier to deal with many LDAP groups.

Screenshots

text input (actual)

textarea (idea)

[wxiaoguang]

-> Minor UI improvements: logo alignment, auth map editor, auth name display #25043