This is {{hmbox}}, an {{mbox}} for hatnote-style templates such as {{resolved}} which are placed at the top of discussions or other matters which have been closed.

{{hmbox
| class   = 
| image   = 
| message = 
| extra   = {{{1|}}}
}}
{{hmbox
| class   = resolved
| image   = Yes check.svg
| message = Resolved
| extra   = {{{1|}}}
}}

produces:

Resolved