Save current facility on save action

unsaved combobox choices only are saved when the current index is
changed, need to save when the form is closed (saved).

PKHeX.WinForms/Subforms/Save Editors/Gen7/SAV_FestivalPlaza.cs

@@ -244,6 +244,7 @@ private void Save()
             for (int i = 1; i < CLB_Reward.Items.Count; i++)
                 SAV.SetFestaPrizeReceived(i - 1, r[(int)CLB_Reward.GetItemCheckState(i)]);
 
+            SaveFacility();
             foreach (FestaFacility facility in f)
                 facility.CopyTo(SAV);