Improve list view and add cookie

lib/wish_web/layout.ex

@@ -0,0 +1,16 @@
+defmodule WishWeb.Plug.GetLayoutFromCookie do
+  import Plug.Conn
+
+  def init(_) do
+    %{}
+  end
+
+  def call(conn, _opts) do
+    conn = fetch_cookies(conn)
+
+    case conn.cookies["user_display"] do
+      nil -> conn
+      other -> conn |> put_session(:user_display, other)
+    end
+  end
+end