Add 'edit' and 'delete' to the preview pane menu for ease of use

Currently, to edit or delete an item, you select it in the list pane, then select 'edit' or 'delete' from the list pane menu.

However, this seems counter-intuitive when the item is displayed in the preview pane.  I would expect to find an 'edit' and 'delete' option in the list-pane menu, at least when an item is displayed.

Can we have these two commands added to the preview pane menu for ease of use?

It may also be helpful to have 'edit' 'delete' and 'add' as separate buttons entirely, for ease of use