Split Control class into configurations and outputs control classes

Summary:
In order to control the behavior of global output data and configuration
data in a structured manner split the Control class up into subclasses
for control of global data of outputs and data of configurations.

Test Plan: Autotest passes.

Reviewers: #plasma, mart

Reviewed By: #plasma, mart

Subscribers: plasma-devel

Tags: #plasma

Maniphest Tasks: T10028

Differential Revision: https://phabricator.kde.org/D16994