Correct several small bugs found in user testing

* The "Show Plan for Tools" link should open a new window each time
    it is clicked (i.e., don't re-use the same window)
  * Further customize the title of the crafting page to give some
    indication of what is being crafted

src/client/site/craft_page/craft_page_controller.coffee

@@ -60,7 +60,9 @@ module.exports = class CraftPageController extends PageController
         return c.text.craftDescription()
 
     getTitle: ->
-        return 'Craft'
+        description = @model.craftsman.want.toDescription()
+        return null unless description?
+        return "Crafting Plan for #{description}"
 
     # BaseController Overrides #####################################################################
 
@@ -114,6 +116,8 @@ module.exports = class CraftPageController extends PageController
         @model.craftsman.have.clear()
         @model.craftsman.have.parse @_storage.load('crafting-plan:have')
         @model.craftsman.have.on c.event.change, => @onHaveInventoryChanged()
+
+        @model.craftsman.want.on c.event.change, => @refresh()
         super
 
     refresh: ->

src/client/site/craft_page/step/step_controller.coffee

@@ -99,8 +99,9 @@ module.exports = class StepController extends BaseController
             inventory.add toolStack.itemSlug, toolStack.quantity
         inventory.localize()
 
-        @$toolButton.attr 'href', "/craft/#{inventory.unparse()}"
-        @$toolButton.attr 'target', 'new'
+        inventoryText = inventory.unparse()
+        @$toolButton.attr 'href', "/craft/#{inventoryText}"
+        @$toolButton.attr 'target', inventoryText
 
         if @canAddTools this
             @$toolButton.removeClass 'disabled'