checkGroup only checked for DOWN/SSL EXP and PENDING. Groups
now reflect STALE and LATE children with proper priority:
DOWN > STALE > LATE > PENDING > UP.
New intermediate state between LATE and DOWN at the midpoint of
the grace period. Gives operators earlier warning that a push
monitor has gone quiet. Includes dedicated orange theme color
across all 5 themes and proper styling in dashboard, detail
panel, and history view.
lerko
