Fixed html validation: element nav does not need a role attribute.

CHANGES.rst

@@ -10,6 +10,9 @@ New:
 
 Fixes:
 
+- Fixed html validation: element nav does not need a role attribute.
+  [maurits]
+
 - Fix test isolation problems: if a test calls transaction.commit() directly or
   indirectly it can not be an integration test, either avoid the commit or
   change the layer into a functional one.

plone/app/layout/viewlets/path_bar.pt

@@ -1,4 +1,4 @@
-<nav id="portal-breadcrumbs" class="plone-breadcrumb" role="navigation"
+<nav id="portal-breadcrumbs" class="plone-breadcrumb"
          i18n:domain="plone"
          tal:define="breadcrumbs view/breadcrumbs">
   <div class="container">

plone/app/layout/viewlets/sections.pt

@@ -7,7 +7,7 @@
      i18n:domain="plone">
 
   <p class="hiddenStructure" i18n:translate="heading_sections">Navigation</p>
-  <nav class="plone-navbar" id="portal-globalnav-wrapper" role="navigation">
+  <nav class="plone-navbar" id="portal-globalnav-wrapper">
     <div class="container">
       <div class="plone-navbar-header">
         <button type="button" class="plone-navbar-toggle" data-toggle="collapse" data-target="#portal-globalnav-collapse">

plone/app/layout/viewlets/toolbar.pt

@@ -9,7 +9,7 @@
         <img alt="Plone Toolbar" tal:attributes="src view/get_toolbar_logo" />
       </a>
       <a class="plone-toolbar-switcher" tal:condition="view/show_switcher"><span>Left-Top switcher</span></a>
-      <nav role="navigation">
+      <nav>
         <ul class="plone-toolbar-main">
           <div tal:replace="structure view/base_render">
           </div>