force selects to ltr so they display correctly, as mac widgets aren't set up

to draw rtl like gecko expects. (bug 154632, r=bryner). not part of build.

layout/html/document/src/mac/platform-forms.css

@@ -54,6 +54,7 @@ select {
   background-color: transparent !important;
   color: -moz-FieldText !important;
   font-size: 11px;
+  direction: ltr;
 }
 
 /* Need the "select[size][multiple]" selector to override the settings on