[O] Bug: org-agenda-overriding-columns-format destroyed on revert [9.2.1 (9.2.1-2-gc6d37c-elpaplus)]

[Allen Li]

0. Make /tmp/tmp.org containing

* TODO foo bar

1. emacs -Q
2. Eval (setq org-agenda-custom-commands '(("n" "n" alltodo "" 
((org-agenda-overriding-columns-format "%TODO")))))
3. Eval (setq org-agenda-files '("/tmp/tmp.org"))
4. M-x org-agenda RET n
5. Move point to item
6. C-c C-x C-c (column view)
7. g

Expected:

Column format is preserved

Actual:

Column format is reset

(The example uses the version of Org shipped with Emacs, but I can
reproduce with my personal config using latest org-contrib-plus)

Emacs  : GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2018-07-05
Package: Org mode version 9.2.1 (9.2.1-2-gc6d37c-elpaplus @ 
/home/ionasal/.emacs.d/elpa/org-plus-contrib-20190204/)