Effects for Deck 3 and 4 not working after changing from Shade skin

Shade tries to disable all effects on start-up. In since the controls of Deck 3 and 4 are not created on initial start with Shade it creates them through the skin.
The real one cannot be created anymore when changing to a real skin.

```
warning [Main] ControlObject "[EffectRack1_EffectUnit1]" "group_[Channel4]_enable" already created
critical [Main] DEBUG ASSERT: "!"pCreatorCO != nullptr, ControlObject already created"" in function static QSharedPointer<ControlDoublePrivate> ControlDoublePrivate::getControl(const ConfigKey&, ControlFlags, ControlObject*, bool, bool, bool, double) at /home/sperry/workspace/2.3/src/control/control.cpp:158

```