Moved option next to rest of org-mode config.
Changed key-banding.

Previous one was based on IntelliJ shortcut for similar action.  But as
it turn out, emacs already has this one taken, and after some time I
found myself wanting to use "M-w" to copy region.
Yeat another way to change buffors.

There is so many different ways to switch between files and buffors, and
yet I did not found any one to be most usefull.  Will have investigate
some more.
Disable rainbow-delimiters in org-mode

since coloring of any delimiters brakes orginal coloring of org-mode.