Add better support for turning mods on/off

* Make the Minecraft "mod" enabled at all times
* Sort the list of mods to move required mods to the top
* Automatically enable a mod which has a recipe selected (e.g., from
  a query param)

src/scripts/controllers/crafting_table_controller.coffee

@@ -110,10 +110,12 @@ module.exports = class CraftingTableController extends BaseController
     _craft: ->
         if @model.catalog.hasRecipe @model.name
             router.navigate "/item/#{encodeURIComponent(@model.name)}"
-            @model.craft()
         else
             router.navigate "/item"
 
+        @model.craft()
+        @refresh()
+
     _updateNameAutocomplete: ->
         onChanged = => @onNameFieldChanged()
 

src/scripts/controllers/recipe_book_controller.coffee

@@ -6,6 +6,7 @@
 ###
 
 BaseController = require './base_controller'
+{RequiredMods} = require '../constants'
 
 ########################################################################################################################
 
@@ -32,7 +33,13 @@ module.exports = class RecipeBookController extends BaseController
         super
 
     refresh: ->
-        if @model.enabled then @$enabled.attr('checked', 'checked') else @$enabled.removeAttr('checked')
+        if @model.modName in RequiredMods
+            @$enabled.attr 'checked', 'checked'
+            @$enabled.attr 'disabled', 'disabled'
+        else
+            @$enabled.removeAttr 'disabled'
+            if @model.enabled then @$enabled.attr('checked', 'checked') else @$enabled.removeAttr('checked')
+
         @$name.html "#{@model.modName} (#{@model.modVersion})"
         @$description.html "#{@model.description}"