add suppliers/lists ui styling and security fixes

app/models/supplier.rb

@@ -5,6 +5,7 @@ class Supplier
 
   property :name
   property :open, type: :boolean, default: false
+  property :night_offset, type: Float
   
   #WIFI
   property :offer_wifi
@@ -16,6 +17,7 @@ class Supplier
   has_many :products, dependent: :destroy
   has_many :product_categories, dependent: :destroy
   has_many :tables, dependent: :destroy
+  has_many :lists, dependent: :destroy
   #has_many :lists, through: :tables
   has_many :orders
   has_many :sections, dependent: :destroy
@@ -63,7 +65,6 @@ class Supplier
     self.open = false
     save
   end
-
   private
 
   def add_section_on_create