lisp/org.el: Don't let `visual-line-mode' override Org's keybindings

* lisp/org.el (org-mode): Don't let `visual-line-mode' override
Org's keybindings for C-a, C-e and C-k.

Reported-by: Gustavo Barros <gusbrs.2016@gmail.com>
Link: https://orgmode.org/list/87a6zkv3m2.fsf@gmail.com/

lisp/org.el

@@ -4903,6 +4903,18 @@ The following commands are available:
      (when org-startup-numerated (require 'org-num) (org-num-mode 1))
      (when org-startup-indented (require 'org-indent) (org-indent-mode 1))))
 
+  ;; Add a custom keymap for `visual-line-mode' so that activating
+  ;; this minor mode does not override Org's keybindings.
+  ;; FIXME: Probably `visual-line-mode' should take care of this.
+  (let ((oldmap (cdr (assoc 'visual-line-mode minor-mode-map-alist)))
+        (newmap (make-sparse-keymap)))
+    (set-keymap-parent newmap oldmap)
+    (define-key newmap [remap move-beginning-of-line] nil)
+    (define-key newmap [remap move-end-of-line] nil)
+    (define-key newmap [remap kill-line] nil)
+    (make-local-variable 'minor-mode-overriding-map-alist)
+    (push `(visual-line-mode . ,newmap) minor-mode-overriding-map-alist))
+
   ;; Activate `org-table-header-line-mode'
   (when org-table-header-line-p
     (org-table-header-line-mode 1))