Fixed an issue in which unnecessary separator could could exist in the Ringtone menu in Preferences.
Fixed an issue in which unnecessary separator could could exist in the Ringtone menu in Preferences.

mralexgray/SwitchBoard,martinkero/Telephone,inz/Telephone,mobdim/Telephone,nriley/Telephone,thierryc/Telephone,einfallstoll/Telephone,thinkski/Telephone