issue here is that <tr> element bears a foreach, which we have to keep, so can't just insert new tds in the row (they'll get repeated), we can't remove the tr (not without grafting the old attributes), etc...
it's really kind-of a pain.
Basically, the replaceAll() is used to make the <t> just created replace the <tr> matched, the unwrapAll removes the <table> around it all, resulting in a <t> with the buttons inserted before and after it, all landed in the editable-listview-generated-row
bzr revid: xmo@openerp.com-20110909134244-mbf5sf4to09fvsyi