Rename and document more contest setup functions

Also properly label the link contest flags variable, and label the
contest window ID's.

src/reshow_battle_screen.c

@@ -154,7 +154,7 @@ static void CB2_ReshowBattleScreenAfterMenu(void)
 
             if (gWirelessCommType != 0 && gReceivedRemoteLinkPlayers != 0)
             {
-                sub_800E0E8();
+                LoadWirelessStatusIndicatorSprite();
                 CreateWirelessStatusIndicatorSprite(0, 0);
             }
         }