Activate Foundation's dropdowns after tab switch

If the dropdown doesn't exist during page load, Foundation misses it. We
need to initialise it again.

app/assets/javascripts/darkswarm/controllers/products_controller.js.coffee

@@ -29,11 +29,17 @@ Darkswarm.controller "ProductsCtrl", ($scope, $filter, $rootScope, Products, Ord
       data.map( (taxon) ->
         $scope.supplied_taxons[taxon.id] = Taxons.taxons_by_id[taxon.id]
       )
+      # Some taxons may be displayed in a dropdown.
+      # Foundation needs initialising again to add dropdown actions.
+      Foundation.init()
     OrderCycleResource.properties params, (data)=>
       $scope.supplied_properties = {}
       data.map( (property) ->
         $scope.supplied_properties[property.id] = Properties.properties_by_id[property.id]
       )
+      # Some properties may be displayed in a dropdown.
+      # Foundation needs initialising again to add dropdown actions.
+      Foundation.init()
 
   $scope.loadMore = ->
     if ($scope.page * $scope.per_page) <= Products.products.length