Delete functionality on backstage

[shahzebasif-zz]

It would be great to have a delete button on the backstage so we can delete snippets faster and possibly even delete multiple snippets at once.

[Zlatkovsky]

This isn't hard to do from a technical perspective -- but I think there is a larger discussion/design that needs to happen for the backstaging, incl. the ability to easily search/tag/etc. Assigning to @yolena and @peronald .