Fixed some hardware sorting issue in the gadget. Hardware with the same type and name would be added to the same section.

GUI/SensorGadget.cs

@@ -486,7 +486,7 @@ namespace OpenHardwareMonitor.GUI {
         if (x.HardwareType != y.HardwareType)
           return x.HardwareType.CompareTo(y.HardwareType);
 
-        return x.Name.CompareTo(y.Name);
+        return x.Identifier.CompareTo(y.Identifier);
       }
     }
   }

Hardware/Identifier.cs

@@ -101,8 +101,8 @@ namespace OpenHardwareMonitor.Hardware {
     }
 
     public static bool operator ==(Identifier id1, Identifier id2) {
-      if (id1 == null)
-        return id2 == null;
+      if (id1.Equals(null))
+        return id2.Equals(null);
       else
         return id1.Equals(id2);
     }