Bug: Allow 'update' recipes to be found properly

Fix a bug where `ModPack.findRecipes` would only look for recipes for
qualified slugs in the mod which added the item, thus missing any
recipes added in other mods.

src/scripts/models/mod_pack.coffee

@@ -86,7 +86,6 @@ module.exports = class ModPack extends BaseModel
 
         for mod in @_mods
             continue unless mod.enabled
-            continue if itemSlug.isQualified and itemSlug.mod isnt mod.slug
             mod.findRecipes itemSlug, result
 
         result.sort (a, b)-> Recipe.compareFor a, b, itemSlug

src/scripts/models/mod_version.coffee

@@ -132,10 +132,10 @@ module.exports = class ModVersion extends BaseModel
                 callback recipe
 
     findRecipes: (itemSlug, result=[])->
-        recipeList = @_recipes[itemSlug.item]
+        for k, recipeList of @_recipes
-        if recipeList?
             for recipe in recipeList
-                result.push recipe
+                if recipe.produces itemSlug
+                    result.push recipe
 
         return result