D25877: [KColorschemeManager] Add option to reenable following global theme

[David Redondo]

davidre added a task: T12147: KConfigWidgets.

REPOSITORY
  R265 KConfigWidgets

REVISION DETAIL
  https://phabricator.kde.org/D25877

To: davidre, #frameworks
Cc: ngraham, kde-frameworks-devel, LeGast00n, GB_2, michaelh, bruns