refresh data when assign a team to a volunteer, and can unassign

src/store/volunteerList.ts

@@ -48,6 +48,8 @@ export const fetchVolunteerListIfNeed = (): AppThunk => (dispatch, getState) =>
     return null
 }
 
+export const refreshVolunteerList = (): AppThunk => (dispatch) => dispatch(fetchVolunteerList())
+
 export const selectVolunteerListState = (state: AppState): EntitiesRequest<Volunteer> =>
     state.volunteerList