Issue #3449328: Hide new drupal admin navigation on mercury editor routes
(cherry picked from commit 9426c8a8)
56af6f5d Hide the new admin navigation on mercury editor routes 11efb8ed Merge branch '2.1.x' into 3449328-hide-new-drupal
Co-authored-by: wotnak 47218-wotnak@users.noreply.drupalcode.org