D23835: Add TabKCM

[Nathaniel Graham]

ngraham added a dependent revision: D23836: Use new TabKCM API.

REPOSITORY
  R296 KDeclarative

REVISION DETAIL
  https://phabricator.kde.org/D23835

To: nicolasfella, mart
Cc: zzag, ngraham, kde-frameworks-devel, LeGast00n, GB_2, michaelh, bruns