Delete image from the editing section, not only from the tree structure

When I select an image in the editor (I mean the the middle main section of the screen where I am writing my article in edit mode) and then hit delete, to be able to delete it from there. Currently, if I want to delete an image, I have to go extra to the tree and hit delete form there and also be careful not to delete the wrong one, which is annoying :)

Thanks!