Deprecate node_mark

Created 📌 Move MARK_* constants from theme.inc into Enum in History module Active as well now that the history module is the only user of these constants.

Seems pretty straightforward and deprecation appears correct.

I opened the issue long enough ago that I'd forgotten about the list builder comment in the issue summary so had to think it through again. I think it's fine for that to not have the soft dependency on history module, views provides the more full-featured version now.

Committed/pushed to 11.x, thanks!

catch → closed merge request !11541

Automatically closed - issue fixed for 2 weeks with no activity.