Fix delete/trash document notification

Steps to reproduce:

• Navigate to any document.
• Click on the Delete icon.
  => Document is trashed.
  => Toast notification displays incorrect:

  Document removed from clipboard

Workaround:

• Navigate to the document's parent.
• Trash the document by selecting it from the parent's content view and clicking on the Delete icon.
  => Toast notification displays [kind of] correct message:

  Document successfully deleted

  Although, this message should probably say:

  Document successfully trashed.