Fix Dock Locking

Summary:
Disable the docks widget not the dock. This allows for the user to move the dock
under any connection state

Reviewers: tcanabrava, patrickelectric, laysrodrigues

Reviewed By: laysrodrigues

Subscribers: Atelier: AtCore

Tags: Atelier: AtCore

Differential Revision: https://phabricator.kde.org/D11403