If any one else is still looking for this, this is a quick hack. You'll need javascript to do it but it is quick and simple.
in admin/includes/modules/product/preview_info.php
find the </form> tag towards the end of the file and add this right after it:
Code:
<script type="text/javascript">
// auto submit form
document.forms['<?php echo $form_action;?>'].submit();
</script>
this will auto submit the preview form for you making the product editing a one step process. Haven't tested it extensibly yet for it works for my current needs.
Bookmarks