Use last appearance settings. Show last edit date

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/admin/appearances_controller.rb

@@ -29,7 +29,7 @@ class Admin::AppearancesController < Admin::ApplicationController
 
   # Use callbacks to share common setup or constraints between actions.
   def set_appearance
-    @appearance = Appearance.first || Appearance.new
+    @appearance = Appearance.last || Appearance.new
   end
 
   # Only allow a trusted parameter "white list" through.

app/views/admin/appearances/_form.html.haml

@@ -21,7 +21,11 @@
         = image_tag @appearance.logo, class: 'appearance-logo-preview'
       = f.file_field :logo, class: ""
       .hint
-        Logo size is limited with 1MB
+        Maximum logo size is 1MB, page optimized for logo size 640x360px
   .form-actions
     = f.submit 'Save', class: 'btn btn-save'
     = link_to 'Preview', preview_admin_appearances_path, class: 'btn', target: '_blank'
+
+    - if @appearance.updated_at
+      %span.pull-right
+        Last edit #{time_ago_with_tooltip(@appearance.updated_at)}

spec/factories/appearances.rb

+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :appearance do
+    title "GitLab Enterprise Edition"
+    description "Open source software to collaborate on code"
+  end
+end

spec/models/appearance_spec.rb

+require 'spec_helper'
+
+describe Appearance do
+  subject { create(:appearance) }
+
+  it { should be_valid }
+end