Add keybindings for `org-element-forward', `org-element-backward', `org-element-up' and `org-element-down'.

* org.el (org-mode-map): Add keybindings for
`org-element-forward', `org-element-backward',
`org-element-up' and `org-element-down'.

lisp/org.el

@@ -17819,6 +17819,11 @@ BEG and END default to the buffer boundaries."
     (org-defkey narrow-map "e" 'org-narrow-to-element)
   (org-defkey org-mode-map "\C-xne" 'org-narrow-to-element))
 (org-defkey org-mode-map "\C-\M-t"    'org-element-transpose)
+(org-defkey org-mode-map "\C-\M-f"    'org-element-forward)
+(org-defkey org-mode-map "\C-\M-b"    'org-element-backward)
+(org-defkey org-mode-map "\C-\M-u"    'org-element-up)
+(org-defkey org-mode-map "\C-\M-d"    'org-element-down)
+(org-defkey org-mode-map "\C-\M-t"    'org-element-transpose)
 (org-defkey org-mode-map "\C-c\C-f"    'org-forward-same-level)
 (org-defkey org-mode-map "\C-c\C-b"    'org-backward-same-level)
 (org-defkey org-mode-map "\C-c$"    'org-archive-subtree)