[IMP] positioning of edition fields within a scrolled dialog

they still don't work every time, but should be slightly more reliable

bzr revid: xmo@openerp.com-20121031140718-j3e4r9djyq34rqu7

addons/web/static/src/js/view_list_editable.js

@@ -252,9 +252,10 @@ openerp.web.list_editable = function (instance) {
             var position = $cell.position();
 
             field.set_dimensions($cell.outerHeight(), $cell.outerWidth());
-            field.$el.css({
-                top: position.top,
-                left: position.left,
+            field.$el.position({
+                my: 'left top',
+                at: 'left top',
+                of: $cell
             });
         },
         /**