refactor some code out of sflphone_const.h

gnome/src/Makefile.am

gnome/src/accountlist.c

gnome/src/config/accountconfigdialog.c

gnome/src/config/accountlistconfigdialog.c

gnome/src/config/addressbook-config.c

gnome/src/config/assistant.c

gnome/src/config/audioconf.c

gnome/src/config/preferencesdialog.c

gnome/src/config/shortcuts-config.c

gnome/src/contacts/calllist.c

gnome/src/contacts/calltree.c

gnome/src/contacts/history.c

gnome/src/contacts/searchbar.c

gnome/src/dbus/dbus.c

gnome/src/dialpad.c

gnome/src/eel-gconf-extensions.h

gnome/src/imwindow.c

gnome/src/mainwindow.c

gnome/src/sflphone_const.h

gnome/src/shortcuts.c