Make it possible to support exclusive action groups
Summary:
We need to find away to import 2.3 if available otherwise modelData.Controls.ActionGroup returns null.
CCBUG: 391144
Reviewers: Kirigami, mart
Reviewed By: Kirigami, mart
Subscribers: mart, plasma-devel
Tags: Kirigami
Differential Revision: https://phabricator.kde.org/D10892