[ #12352 ] Use object instead of QString id for 'addDialingCall'

kde/src/CallView.cpp

kde/src/SFLPhoneView.cpp

kde/src/klib/dataengine/sflphoneService.cpp

kde/src/klib/dataengine/sflphoneService.h

kde/src/lib/CallModel.cpp

kde/src/lib/CallModel.h

kde/src/lib/CallModel.hpp

kde/src/widgets/ContactItemWidget.cpp

kde/src/widgets/HistoryDock.cpp

kde/src/widgets/HistoryTreeItem.cpp