org-habit: Preserve invisibility when inserting consistency graph

* lisp/org-habit.el (org-habit-insert-consistency-graphs): Inherit
'invisible text property of the habit line when the habit is hidden in
agenda.

Fixes https://orgmode.org/list/PAXPR06MB776069E9085C1CD606156493C6709@PAXPR06MB7760.eurprd06.prod.outlook.com

lisp/org-habit.el

@@ -428,7 +428,8 @@ current time."
     (save-excursion
       (goto-char (if line (point-at-bol) (point-min)))
       (while (not (eobp))
-	(let ((habit (get-text-property (point) 'org-habit-p)))
+	(let ((habit (get-text-property (point) 'org-habit-p))
+              (invisible-prop (get-text-property (point) 'invisible)))
 	  (when habit
 	    (move-to-column org-habit-graph-column t)
 	    (delete-char (min (+ 1 org-habit-preceding-days
@@ -439,7 +440,12 @@ current time."
 	      habit
 	      (time-subtract moment (days-to-time org-habit-preceding-days))
 	      moment
-	      (time-add moment (days-to-time org-habit-following-days))))))
+	      (time-add moment (days-to-time org-habit-following-days))))
+            ;; Inherit invisible state of hidden entries.
+            (when invisible-prop
+              (put-text-property
+               (- (point) org-habit-graph-column) (point)
+               'invisible invisible-prop))))
 	(forward-line)))))
 
 (defun org-habit-toggle-habits ()