D28819: [KRichTextEdit] Always treat key press as single modification in undo stack

[David Faure]

dfaure accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R310 KTextWidgets

BRANCH
  single-undo (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D28819

To: poboiko, #frameworks, mlaurent, dfaure
Cc: ahmadsamir, kde-frameworks-devel, LeGast00n, cblack, michaelh, ngraham, 
bruns