“Section 133(b) of the Courts of Justice Act, R.S.O. 1990, c. C.43, provides that leave is required where the appeal is only as to a discretionary costs order. However, when “the disposition on appeal changes the decision under appeal, leave to appeal from a costs order is not necessary”: Tadayon v. Mohtashami, 2015 ONCA 777, at para. 70; see also Beaver v. Hill, 2018 ONCA 840, at para. 2, leave to appeal refused, [2019] S.C.C.A. No. 82.”