Enforce `org-bookmark-names-plist'

* lisp/org-capture.el (org-capture-goto-last-stored): Use
  `org-bookmark-names-plist'.
* lisp/org.el (org-refile-goto-last-stored): Use
  `org-bookmark-names-plist'.

lisp/org-capture.el

@@ -811,7 +811,8 @@ already gone.  Any prefix argument will be passed to the refile command."
   "Go to the location where the last capture note was stored."
   (interactive)
   (org-goto-marker-or-bmk org-capture-last-stored-marker
-			  "org-capture-last-stored")
+			  (plist-get org-bookmark-names-plist
+				 :last-capture))
   (message "This is the last note stored by a capture process"))
 
 ;;; Supporting functions for handling the process

lisp/org.el

@@ -11746,7 +11746,7 @@ prefix argument (`C-u C-u C-u C-c C-w')."
 (defun org-refile-goto-last-stored ()
   "Go to the location where the last refile was stored."
   (interactive)
-  (bookmark-jump "org-refile-last-stored")
+  (bookmark-jump (plist-get org-bookmark-names-plist :last-refile))
   (message "This is the location of the last refile"))
 
 (defun org-refile--get-location (refloc tbl)