Have KCModuleProxy take care of the defaulted state
Summary:
Now that KCModule exposes a defaulted() signal, consume it and keep our
own defaulted state up to date. This is exposed for further consumption
in the GUIs integrating KCModuleProxy.
This depends on: https://phabricator.kde.org/D25069
Reviewers: Plasma, Frameworks, mart, davidedmundson, dfaure
Reviewed By: Plasma, davidedmundson
Subscribers: kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D25071