Improved GUI opening performance so there is less delay between clicking the icon and the gui actually appearing.

Made network entry list inactive while refreshing networks.
Made debugging output less spammy and more helpful (still incomplete).

wnettools.py

@@ -954,11 +954,11 @@ class WirelessInterface(Interface):
         if max_strength and strength:
             return 100 * int(strength) // int(max_strength)
         
-        if strength == None:
+        if strength is None:
             strength = misc.RunRegex(altstrength_pattern, output)
+        
         return strength
 
-
     def GetDBMStrength(self, iwconfig=None):
         """ Get the dBm signal strength of the current network.