 
     handleKeyDown: (key, e) ->
       switch key
-        when "backspace"
-          @_hideResultsPopover()
         when "enter"
           e.preventDefault()
           @_hideResultsPopover()

namespace 'Exo.Views', (exports) ->
  class exports.AutocompleteTokenField extends Exo.Views.TokenField
    resultsPopoverClass: Exo.Views.CollectionListPopover
    showPopoverOnEmpty: true
    minInputValueLength: 1
    allowNewTokens: true


    _showResultsPopover: _.debounce((query) ->
      resultsCollection = new Thorax.Collection(@matcher.resultsForString(query).array)
      resultsCollection.remove(@tokens.array)

      resultsCollection.add({name: query})

      @resultsPopover.setCollection(resultsCollection)
