Changed names of slots so that they mach the signals

>QMetaObject::connectSlotsByName: No matching signal for on_actionSceneUp_triggered()
QMetaObject::connectSlotsByName: No matching signal for on_actionSceneDown_triggered()
QMetaObject::connectSlotsByName: No matching signal for on_actionSourceUp_triggered()
QMetaObject::connectSlotsByName: No matching signal for on_actionSourceDown_triggered()

That was caused by not matching signals and slots.
I hope that is right, if not ignore and close this.