Use macros for summary windows

Other minor changes and fixes are included

src/battle_tent.c

@@ -269,7 +269,7 @@ static void sub_81B9E88(void)
     DoBattleFactorySwapScreen();
 }
 
-bool8 sub_81B9E94(void)
+bool8 InSlateportBattleTent(void)
 {
     return gMapHeader.regionMapSectionId == MAPSEC_SLATEPORT_CITY
            && (gMapHeader.mapLayoutId == LAYOUT_BATTLE_TENT_CORRIDOR || gMapHeader.mapLayoutId == LAYOUT_BATTLE_TENT_BATTLE_ROOM);