Bug: org-agenda-category-filter-preset in org-agenda-custom-commands with org-agenda-sticky does not work [9.1.2 (release_9.1.2-99-g4d828b @ /home/cperl/git/org-mode/lisp/)]

[Chris Perl <chris.perl@gmail.com>]

When using org-agenda-custom-commands with
org-agenda-category-filter-preset and org-agenda-sticky, it seems as
though changes to org-agenda-category-filter are global, even though
the variable is made buffer local.

From the limited digging I've done, it seems that setting the
:preset-filter property for org-agenda-category-filter affects all
agenda buffers, not just one.

To reproduce, take the following org file:

---8<---
* Foo
  :PROPERTIES:
  :CATEGORY: foo
  :END:
** TODO Foo todo one
   DEADLINE: <2017-10-13 Fri>
   - foo 1

* Bar
  :PROPERTIES:
  :CATEGORY: bar
  :END:
** TODO Bar todo one
   DEADLINE: <2017-10-13 Fri>
   - bar 1
--->8---

And the following elisp file to setup a minimal environment:

---8<---
(require 'org)
(setq org-agenda-files (list (expand-file-name "repro.org")))
(setq org-agenda-sticky t)
(setq org-agenda-custom-commands
      '(("f" "foo"
         ((agenda "" ())
          (tags-todo "+CATEGORY=\"foo\"" ()))
         ((org-agenda-category-filter-preset '("+foo"))))

        ("b" "bar"
         ((agenda "" ())
          (tags-todo "+CATEGORY=\"bar\"" ()))
         ((org-agenda-category-filter-preset '("+bar"))))))

(global-set-key (kbd "C-c a") #'org-agenda)
--->8---

Then run (something like):

emacs -nw -Q -L ~/git/org-mode/lisp -l repro.el repro.org

Followed by:

C-c a f
C-c a b
C-x o
r

I would expect pressing `r' in the `*Org Agenda(f)*' buffer would
keep the original `org-agenda-category-filter-preset' and that the
preset in `*Org Agenda(b)*' should have no bearing on it.  But, as you
can (probably) see from the mode line, the filter is set to "+bar", and
refreshing the buffer causes all the TODOs to be lost because it now has
the wrong filter.


Emacs  : GNU Emacs 25.3.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.22.17)
 of 2017-09-14
Package: Org mode version 9.1.2 (release_9.1.2-99-g4d828b @ /home/cperl/git/org-mode/lisp/)

current state:
==============
(setq
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-activate org-babel-speed-command-activate)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-shell-link-function 'yes-or-no-p
 org-agenda-sticky t
 org-agenda-custom-commands '(("f" "foo" ((agenda "" nil) (tags-todo "+CATEGORY=\"foo\"" nil))
			       ((org-agenda-category-filter-preset (quote ("+foo")))))
			      ("b" "bar" ((agenda "" nil) (tags-todo "+CATEGORY=\"bar\"" nil))
			       ((org-agenda-category-filter-preset (quote ("+bar")))))
			      )
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(#[0 "\300\301\302\303\304$\207" [add-hook change-major-mode-hook org-show-block-all append local] 5]
		 #[0 "\300\301\302\303\304$\207"
		   [add-hook change-major-mode-hook org-babel-show-result-all append local] 5]
		 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-bibtex-headline-format-function #[257 "\300\x01\236A\207" [:title] 3 "\n\n(fn ENTRY)"]
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers org-cycle-show-empty-lines
		  org-optimize-window-after-visibility-change)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-link-parameters '(("id" :follow org-id-open) ("rmail" :follow org-rmail-open :store org-rmail-store-link)
		       ("mhe" :follow org-mhe-open :store org-mhe-store-link)
		       ("irc" :follow org-irc-visit :store org-irc-store-link :export org-irc-export)
		       ("info" :follow org-info-open :export org-info-export :store org-info-store-link)
		       ("gnus" :follow org-gnus-open :store org-gnus-store-link)
		       ("docview" :follow org-docview-open :export org-docview-export :store org-docview-store-link)
		       ("bibtex" :follow org-bibtex-open :store org-bibtex-store-link)
		       ("bbdb" :follow org-bbdb-open :export org-bbdb-export :complete org-bbdb-complete-link :store
			org-bbdb-store-link)
		       ("w3m" :store org-w3m-store-link) ("file+sys") ("file+emacs")
		       ("doi" :follow org--open-doi-link) ("elisp" :follow org--open-elisp-link)
		       ("file" :complete org-file-complete-link)
		       ("ftp" :follow (lambda (path) (browse-url (concat "ftp:" path))))
		       ("help" :follow org--open-help-link)
		       ("http" :follow (lambda (path) (browse-url (concat "http:" path))))
		       ("https" :follow (lambda (path) (browse-url (concat "https:" path))))
		       ("mailto" :follow (lambda (path) (browse-url (concat "mailto:" path))))
		       ("news" :follow (lambda (path) (browse-url (concat "news:" path))))
		       ("shell" :follow org--open-shell-link))
 org-agenda-files '("/home/cperl/tmp/2017-10-05/repro.org")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )