Add js-page-model-attrs-items block to model attributes

Review Request #10979 — Created March 27, 2020 and submitted — Latest diff uploaded

Information

Review Board
master
b21a9e2...

Reviewers

This patch adds a js-page-model-attrs-items block to the js-page-model-attrs
block used to pass model attributes from the Django template to JavaScript views.
Admin views that add attributes to this block have been updated to override this
block with their own attributes as the super block is currently empty. This change
will allow for the Django template to pass attributes to the view for the future
admin setup banner.

Manual verification that admin pages still render correctly.