D5111: Provide demo/preview for checkable menu items and colour scheme comparison

[René J . V . Bertin]

rjvbb added a comment.


  Colour scheme chooser proposition split off: https://phabricator.kde.org/D5113

REVISION DETAIL
  https://phabricator.kde.org/D5111

To: rjvbb, jriddell, anthonyfieroni, zhigalin, hpereiradacosta
Cc: kde-mac, #frameworks