Ability to delete several items at once

I might be missing something, but right now multiselect can only be used to move items between folders and to assign tasks.

It would be great if there would be an option to delete multiple items at once. There could be a failsafe for that (e.g. locking mechanism than disables deletion, several pop-up windows) but right now it seems super unproductive if one needs to delete 10-20 items.

BTW I have no problem with folder deletion only being active when it's empty. That seems to be a good failsafe.