D11620: Proofread kolourpaint docbook for 18.04

[Martin Koller]

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

REPOSITORY
  R374 KolourPaint

REVISION DETAIL
  https://phabricator.kde.org/D11620

To: lueck, mkoller, #documentation
Cc: kde-doc-english