org-indent-mode makes set-goal-column behave surprising

[Martin Edström]

Hello, pinging back on two old emails that seem related:

https://lists.gnu.org/archive/html/emacs-orgmode/2008-01/msg00030.html
https://lists.gnu.org/archive/html/emacs-orgmode/2011-05/msg00654.html

A bug that can be reproduced on Emacs -Q:

- Open an org file that has subtrees at various levels
- Do M-x org-indent-mode RET
- Go forward a few chars inside a line, then do M-x set-goal-column RET RET
- Now move up and down lines. You'll see that it does not stick to any sensible 
"goal column".

I myself rely on this technique (set-goal-column), for example to edit the 
start of each list item in a list, without having to navigate to beginning of 
line again on each item.  But it only works if there are no headings (or 
org-indent-mode is disabled).