Replace non-interactive use of `org-next-item' and `org-previous-item'.

* org.el (org-skip-over-state-notes): do not compute bottom point at
  each item.
* org-mouse.el (org-mouse-for-each-item): use `org-apply-on-list'
  instead of moving to each item.

lisp/org-mouse.el

@@ -148,6 +148,7 @@
 (declare-function org-agenda-change-all-lines "org-agenda"
 		  (newhead hdmarker &optional fixface just-this))
 (declare-function org-verify-change-for-undo "org-agenda" (l1 l2))
+(declare-function org-apply-on-list "org-list" (function init-value &rest args))
 
 (defvar org-mouse-plain-list-regexp "\\([ \t]*\\)\\([-+*]\\|[0-9]+[.)]\\) "
   "Regular expression that matches a plain list.")
@@ -576,14 +577,11 @@ SCHEDULED: or DEADLINE: or ANYTHINGLIKETHIS:"
 	(goto-char (second contextdata))
 	(re-search-forward ".*" (third contextdata))))))
 
-(defun org-mouse-for-each-item (function)
-  (save-excursion
-    (ignore-errors
-      (while t (org-previous-item)))
-    (ignore-errors
-      (while t
-	(funcall function)
-	(org-next-item)))))
+(defun org-mouse-for-each-item (funct)
+  ;; Functions called by `org-apply-on-list' need an argument
+  (let ((wrap-fun (lambda (c) (funcall funct))))
+    (when (org-in-item-p)
+      (org-apply-on-list wrap-fun nil))))
 
 (defun org-mouse-bolp ()
   "Return true if there only spaces, tabs, and '*' before point.

lisp/org.el

@@ -11775,10 +11775,11 @@ EXTRA is additional text that will be inserted into the notes buffer."
 (defun org-skip-over-state-notes ()
   "Skip past the list of State notes in an entry."
   (if (looking-at "\n[ \t]*- State") (forward-char 1))
-  (while (looking-at "[ \t]*- State")
-    (condition-case nil
-	(org-next-item)
-      (error (org-end-of-item)))))
+  (when (org-in-item-p)
+    (let ((limit (org-list-bottom-point)))
+      (while (looking-at "[ \t]*- State")
+	(goto-char (or (org-get-next-item (point) limit)
+		       (org-get-end-of-item limit)))))))
 
 (defun org-add-log-note (&optional purpose)
   "Pop up a window for taking a note, and add this note later at point."