move desktop mode to user pref

app/views/layouts/default.html.erb

@@ -5,7 +5,7 @@
   <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
   <link rel="top" title="<%= Danbooru.config.app_name %>" href="/">
   <%= csrf_meta_tag %>
-  <% unless cookies[:dm] %>
+  <% unless CurrentUser.disable_responsive_mode? %>
     <meta name="viewport" content="width=device-width,initial-scale=1">
   <% end %>
   <meta name="tag-category-names" content="<%= TagCategory.categories %>">

app/views/static/_footer.html.erb

@@ -8,8 +8,10 @@
   <% if CurrentUser.user.enable_post_navigation %>
     &ndash; <%= link_to "Keyboard shortcuts available", keyboard_shortcuts_path %>
   <% end %>
-  <span id="desktop-version-link">
-    &ndash;
-    <%= link_to "Desktop version", site_map_path(:dm => "1"), :rel => "nofollow" %>
-  </span>
+  <% if CurrentUser.is_member? %>
+    <span id="desktop-version-link">
+      &ndash;
+      <%= link_to "Disable responsive mode", edit_user_path(CurrentUser.id), :rel => "nofollow" %>
+    </span>
+  <% end %>
 </footer>

app/views/users/edit.html.erb

@@ -91,11 +91,7 @@
 
         <%= f.input :favorite_tags, :label => "Frequent tags", :hint => "A list of tags that you use often. They will appear when using the list of Related Tags.", :input_html => { :rows => 5, :data => { :autocomplete => "tag-query" } } %>
 
-        <div class="input select field_with_hint">
-          <label class="select optional" for="user_desktop_mode">Desktop mode</label>
-          <%= select_tag "user[desktop_mode]", options_for_select([["No", "0"], ["Yes", "1"]], cookies[:dm]), :class => "select optional" %>
-          <span class="hint">Force desktop version of site even on mobile.</span>
-        </div>
+        <%= f.input :disable_responsive_mode, :as => :select, :collection => [["No", "false"], ["Yes", "true"]], :include_blank => false, :hint => "Disable alternative layout for mobile and tablet" %>
 
         <%= f.input :custom_style, :label => "Custom <a href='http://en.wikipedia.org/wiki/Cascading_Style_Sheets'>CSS</a> style".html_safe, :hint => "Style to apply to the whole site.", :input_html => {:size => "40x5"} %>
       </fieldset>