Fix "x from y" -> "x of y"

program/localization/en_US/labels.inc

@@ -270,7 +270,7 @@ $labels['responsetext'] = 'Response Text';
 $labels['attach'] = 'Attach';
 $labels['attachments'] = 'Attachments';
 $labels['upload'] = 'Upload';
-$labels['uploadprogress'] = '$percent ($current from $total)';
+$labels['uploadprogress'] = '$percent ($current of $total)';
 $labels['close']  = 'Close';
 $labels['messageoptions']  = 'Message options...';
 $labels['togglecomposeoptions'] = 'Toggle composition options';