Rename and document more contest setup functions

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

src/trade.c

@@ -1626,7 +1626,7 @@ static void sub_80773D0(void)
             if (sub_8010500())
             {
                 gMain.state++;
-                sub_800E0E8();
+                LoadWirelessStatusIndicatorSprite();
                 CreateWirelessStatusIndicatorSprite(0, 0);
             }
         }
@@ -1820,7 +1820,7 @@ static void sub_8077B74(void)
     case 5:
         if (gWirelessCommType)
         {
-            sub_800E0E8();
+            LoadWirelessStatusIndicatorSprite();
             CreateWirelessStatusIndicatorSprite(0, 0);
         }
         gMain.state++;
@@ -4246,7 +4246,7 @@ void sub_807AE50(void)
             {
                 if (gWirelessCommType)
                 {
-                    sub_800E0E8();
+                    LoadWirelessStatusIndicatorSprite();
                     CreateWirelessStatusIndicatorSprite(0, 0);
                 }
                 SetMainCallback2(sub_807EA2C);