For example halfling fearless gives +2 bonus on all saving throws against fear. But if you click the ability on the characters ability tab is rolls a skill check not a save. Allow the hold shift to work for the abilities tab just as the main tab for saves or allow a check box that determines if that ability is a save or skill. At this moment you can only code this on the combat tracker as SAVE: 2 charisma which will apply to all charisma saves.