b=154624 Cannot change master password r=javi sr=mscott

security/manager/pki/resources/content/pref-masterpass.js

@@ -103,7 +103,7 @@ function changePasswordSettings(setFocus)
 function ChangePW()
 {
   var params = Components.classes[nsDialogParamBlock].createInstance(nsIDialogParamBlock);
-  params.SetString(1,"_blank");
+  params.SetString(1,"");
   window.openDialog("chrome://pippki/content/changepassword.xul","",
               "chrome,resizable=1,modal=1,dialog=1",params);
 }