Show the FlashAir IP address

Displays the FlashAir IP address in the "Support" menu if the card is available.
If no IP address has been assigned yet, "0.0.0.0" will be displayed.

Firmware/ultralcd.cpp

@@ -2192,11 +2192,14 @@ static void lcd_support_menu()
         // Menu was entered or SD card status has changed (plugged in or removed).
         // Initialize its status.
         _md->status = 1;
-        _md->is_flash_air = card.ToshibaFlashAir_isEnabled() && card.ToshibaFlashAir_GetIP(_md->ip);
-        if (_md->is_flash_air)
+        _md->is_flash_air = card.ToshibaFlashAir_isEnabled();
+        if (_md->is_flash_air) {
+            card.ToshibaFlashAir_GetIP(_md->ip); // ip[4] filled with 0 if it failed
+            // Prepare IP string from ip[4]
             sprintf_P(_md->ip_str, PSTR("%d.%d.%d.%d"), 
                 _md->ip[0], _md->ip[1], 
                 _md->ip[2], _md->ip[3]);
+        }
     } else if (_md->is_flash_air && 
         _md->ip[0] == 0 && _md->ip[1] == 0 && 
         _md->ip[2] == 0 && _md->ip[3] == 0 &&
@@ -2256,7 +2259,11 @@ static void lcd_support_menu()
   if (_md->is_flash_air) {
       MENU_ITEM_BACK_P(STR_SEPARATOR);
       MENU_ITEM_BACK_P(PSTR("FlashAir IP Addr:"));  //c=18 r=1
-///!      MENU_ITEM(back_RAM, _md->ip_str, 0);
+      MENU_ITEM_BACK_P(PSTR(" "));
+      if (((menu_item - 1) == menu_line) && lcd_draw_update) {
+          lcd_set_cursor(2, menu_row);
+          lcd_printf_P(PSTR("%s"), _md->ip_str);
+      }
   }
 
   #ifndef MK1BP