D18026: Use the nicer K_PLUGIN_CLASS_WITH_JSON

[Albert Astals Cid]

aacid closed this revision.

REPOSITORY
  R104 KScreen

REVISION DETAIL
  https://phabricator.kde.org/D18026

To: aacid, davidedmundson
Cc: plasma-devel, kvanton, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, 
ali-mohamed, jensreuterberg, abetts, sebas, apol, mart