D3901: histedit: add history-editing-backup config option

[khanchi97 (Sushil khanchi)]

khanchi97 added inline comments.

INLINE COMMENTS

> pulkit wrote in configitems.py:1096
> sorry for noticing late, but can me move it somewhere else instead of ui. I don't think ui is the right place for it. @yuja what do you think?

@pulkit I do also think ui is not right place for it. And in one of my previous patch I added a new section for this config but I agree with yuya that when adding a new section we should have multiple options to fit in that section and he suggested me to add this in ui section. @pulkit what do you think could be the right place for this config?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3901

To: khanchi97, durin42, #hg-reviewers
Cc: pulkit, yuja, mercurial-devel