D22785: [WIP] Add option to build Qt Designer plugin (BUILD_DESIGNERPLUGIN, default ON

[Friedrich W. H. Kossebau]

kossebau added a dependency: D22724: [WIP] Add ECMAddQtDesignerPlugin.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D22785

To: kossebau
Cc: kde-frameworks-devel, LeGast00n, sbergeron, michaelh, ngraham, bruns