Fix copy/paste of vocabulary entries in Spreadsheet editor

In the Web UI spreadsheet editor, copy / paste using vocabs / dictionaries shows [Object object]. 

Labels are being shoved in within the cell and there are hacks it appears in handsontable to work around this w/ the select2 plugin.

Our use of the spreadsheet editor is to of course make bulk changes to the metadata and we have many vocabs / directories so this feature must work