Return true on default for product isValid

app/assets/javascripts/supplier/app/models/product.js.coffee

@@ -20,4 +20,5 @@ App.Product = DS.Model.extend
   isValid: (-> 
     return false unless price = @get('price')
     return false unless "#{price}".match(/^[+-]?\d+(\.?\d?\d)?$/)
+    true
   ).property('price')

app/controllers/suppliers/product_categories_controller.rb

@@ -1,5 +1,6 @@
 module Suppliers
   class ProductCategoriesController < Suppliers::ApplicationController
+    layout 'tablet'
 
     # GET /product_categories
     # GET /product_categories.json

app/controllers/suppliers/products_controller.rb

@@ -1,5 +1,6 @@
 module Suppliers
   class ProductsController < Suppliers::ApplicationController
+    layout 'tablet'
 
     # GET /products
     # GET /products.json