D10892: Make it possible to support exclusive action groups

[Nathaniel Graham]

ngraham added a dependent revision: D10893: Use an action group for the sort 
options.

REPOSITORY
  R169 Kirigami

REVISION DETAIL
  https://phabricator.kde.org/D10892

To: apol, #kirigami
Cc: mart, plasma-devel, apol, davidedmundson, hein