Support for "info" message level in the admin

[Fran Hrženjak]

We can message the user by calling

self.message_user(
    request,
    “This is a waaarning...",
    messages.WARNING,
)

form within a ModelAdmin. This works for success level (default green message), warning level and error level. I was also expecting it to support “info” level with a blue style, but it is simply not implemented and defaults to green “success” level. Any reason why not?

Seems to need only 4 lines of CSS and maybe an icon, like the other styles: https://github.com/django/django/blob/77d335e5abec889b15323975187a8d5b10bfcb0f/django/contrib/admin/static/admin/css/base.css#L561-L569

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Fran