fix for 50119, make sure that textfields have a white background

themes/classic/global/win/textfield.css

@@ -15,7 +15,7 @@
       color               : windowtext;
       padding             : 0px;
       margin              : 1px 5px 2px 5px;
-      background-color    : window;
+      background-color    : #FFFFFF;
       cursor              : text;
     }