Bug fixed when no ringtones directory found

src/configurationpanel.ui

src/configurationpanel.ui.h

src/configurationpanelui.cpp

src/configurationpanelui.h

src/configurationtree.cpp

src/global.h

src/manager.cpp

src/phonebookui.cpp

src/phonebookui.h

src/url_inputui.cpp

src/url_inputui.h