fix: Resolve enable state for v4l and screen capture (#728)

* fix: Resolve the enable state for v4l and screen capture

* Use instance index instead of pointer

* Second try

* fix(QtGrabber): QScreen ownership

* Remove v4l2 compState listener

libsrc/hyperion/ComponentRegister.cpp

@@ -37,7 +37,6 @@ void ComponentRegister::setNewComponentState(const hyperion::Components comp, co
 		_componentStates[comp] = activated;
 		// emit component has changed state
 	 	emit updatedComponentState(comp, activated);
-		emit _hyperion->compStateChangeRequest(comp, activated);
 	}
 }