Delete-file - button on file upload field

This is a request for some minor changes in the file upload functionality: 

1. Small edit: Move the uploaded file link so it looks like it belongs to the correct field (now the link shows up just above the next field in the list)
2. Bigger edit: add functionality to remove the uploaded file. First it should be possible to clear the file field, something like: 

    <span style="cursor:pointer" class="icon-cancel" onclick="jQuery('#jform_somefilefield_hidden').val(''); jQuery(this).parent().children('a').remove();jQuery(this).remove()"></span>
3. I guess bullet 2 should be followed by actually removing the file in question, probably by overriding the save-function in the JTable-class?