D25714: Port away from deprecated KHtml

[Carl Schwan]

ognarb added a reviewer: Calligra: 3.0.

REPOSITORY
  R8 Calligra

REVISION DETAIL
  https://phabricator.kde.org/D25714

To: ognarb, #calligra:_3.0
Cc: Calligra-Devel-list, davidllewellynjones, dcaliste, ognarb, cochise, vandenoever
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