Hide menu button to managers on small screens

This menu isn't rendered in this case, so the "menu" button to toggle it
did nothing.

app/components/layout/admin_header_component.html.erb

@@ -8,12 +8,14 @@
   </div>
 
   <div class="expanded row admin-top-bar">
+    <% if show_account_menu? %>
       <div class="title-bar" data-responsive-toggle="responsive_menu" data-hide-for="medium">
         <button class="menu-button" type="button" data-toggle="responsive_menu">
           <span class="menu-icon"></span>
           <span class="title-bar-title"><%= t("application.menu") %></span>
         </button>
       </div>
+    <% end %>
 
     <div class="top-bar">
       <div class="top-bar-left">
@@ -25,7 +27,7 @@
         </h1>
       </div>
 
-      <% if show_admin_menu?(user) || namespace != "management" %>
+      <% if show_account_menu? %>
         <div id="responsive_menu">
           <div class="top-bar-right">
             <%= render Layout::AccountMenuComponent.new(user) %>

app/components/layout/admin_header_component.rb

@@ -25,4 +25,8 @@ class Layout::AdminHeaderComponent < ApplicationComponent
         namespaced_root_path
       end
     end
+
+    def show_account_menu?
+      show_admin_menu?(user) || namespace != "management"
+    end
 end

spec/components/layout/admin_header_component_spec.rb

@@ -9,7 +9,7 @@ describe Layout::AdminHeaderComponent do
   end
 
   context "management section", controller: Management::BaseController do
-    it "shows the menu for administrators" do
+    it "shows the menu button and menu for administrators" do
       create(:administrator, user: user)
 
       render_inline Layout::AdminHeaderComponent.new(user)
@@ -19,9 +19,10 @@ describe Layout::AdminHeaderComponent do
       expect(page).to have_link "My content"
       expect(page).to have_link "My account"
       expect(page).to have_link "Sign out"
+      expect(page).to have_css "[data-toggle]"
     end
 
-    it "does not show the menu managers" do
+    it "does not show the menu button and menu for managers" do
       create(:manager, user: user)
 
       render_inline Layout::AdminHeaderComponent.new(user)
@@ -31,6 +32,7 @@ describe Layout::AdminHeaderComponent do
       expect(page).not_to have_content "My content"
       expect(page).not_to have_content "My account"
       expect(page).not_to have_content "Sign out"
+      expect(page).not_to have_css "[data-toggle]"
     end
   end
 end