Add admin interface for user feedbacks

app/controllers/admin/user_feedbacks_controller.rb

@@ -0,0 +1,16 @@
+# encoding: UTF-8
+module Admin
+  class UserFeedbacksController < Admin::ApplicationController
+    def index
+      @user_feedbacks = UserFeedback.all(page: params[:page], per_page: params[:per_page].presence || 40 )
+    end
+
+    def show
+      render nothing: true
+    end
+
+    def edit
+      render nothing: true
+    end
+  end
+end