Reduce typing to parent class on addMission and removeMission
Reduce typing to parent class on addMission and removeMission

SuiviUpdateAction uses the Doctype type for generality

N7-Consulting/Incipio,M-GaTE/Jeyser,M-GaTE/Jeyser,N7-Consulting/Incipio,n7consulting/Incipio,n7consulting/Incipio,N7-Consulting/Incipio,n7consulting/Incipio,N7-Consulting/Incipio,M-GaTE/Jeyser,M-GaTE/Jeyser