Save complex heading regexp for column view

* lisp/org.el (org-scan-tags): Also remember `org-complex-heading-regexp'
in a property.

lisp/org.el

@@ -12698,6 +12698,7 @@ only lines with a TODO keyword are included in the output."
 		      'mouse-face 'highlight
 		      'org-not-done-regexp org-not-done-regexp
 		      'org-todo-regexp org-todo-regexp
+		      'org-complex-heading-regexp org-complex-heading-regexp
 		      'help-echo
 		      (format "mouse-2 or RET jump to org file %s"
 			      (abbreviate-file-name