APO controller should not use a fluid layout

app/controllers/apo_controller.rb

@@ -24,13 +24,13 @@ class ApoController < ApplicationController
   def edit
     authorize! :create, Dor::AdminPolicyObject
     @form = ApoForm.new(@object)
-    render layout: 'blacklight'
+    render layout: 'one_column'
   end
 
   def new
     authorize! :create, Dor::AdminPolicyObject
     @form = ApoForm.new(Dor::AdminPolicyObject.new)
-    render layout: 'blacklight'
+    render layout: 'one_column'
   end
 
   def create

app/helpers/argo_helper.rb

@@ -7,6 +7,8 @@ module ArgoHelper
 
   # This overrides a blacklight helper so that the page is full-width
   def container_classes
+    return super if controller_name == 'apo'
+
     'container-fluid'
   end
 

app/views/layouts/one_column.html.erb

@@ -0,0 +1,7 @@
+<% content_for(:content) do %>
+  <section class="col-md-12">
+    <%= yield %>
+  </section>
+<% end %>
+
+<%= render template: "layouts/blacklight/base" %>

app/views/shared/_header_navbar.html.erb

@@ -1,5 +1,5 @@
 <nav class="navbar navbar-expand-md navbar-dark bg-dark topbar" role="navigation">
-  <div class="<%= container_classes %>">
+  <div class="container-fluid">
     <%= link_to application_name, root_path, class: 'mb-0 navbar-brand navbar-logo' %>
     <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#user-util-collapse" aria-controls="user-util-collapse" aria-expanded="false" aria-label="Toggle navigation">
       <span class="navbar-toggler-icon"></span>
@@ -12,7 +12,7 @@
 </nav>
 
 <div class="navbar-search navbar navbar-light bg-light" role="navigation">
-  <div class="<%= container_classes %>">
+  <div class="container-fluid">
     <%= render_search_bar %>
   </div>
 </div>