"Delete" tab should be higher weight than "Edit" tab

Currently, the Edit and Delete tabs both have weight=0, and the Delete tab is appearing to the left of the Edit tab. This does not follow Drupal convention. For example, comments have the Approve and Delete tabs at higher weight. This patch follows the comment module example, and gives the Delete tab weight=1 (there's no Approve tab, so it doesn't need to be weight=2).