[template] `container` classes must not be nested (closes #3892039)

views/basetemplates.py

@@ -216,7 +216,7 @@
     title = self._cw.property_value('ui.site-title')
     w(u'<header class="navbar %s" role="banner">' %
       self.css.get('header-navbar', 'header-navbar'))
-    w(u'<nav class="container-fluid">')
+    w(u'<nav>')
     self.dispaly_navbar_header(w, view)
     self.display_header_components(w, view, 'header-left')
     self.display_header_components(w, view, 'header-right')
@@ -259,6 +259,5 @@
     if components:
         self.w(u'<nav role="navigation" class="%s">' %
             self.css.get('breadcrumbs', 'breadcrumbs-defaul'))
-        self.w(u'<div class="container">')
         for component in components:
             component.render(w=self.w)
@@ -263,6 +262,5 @@
         for component in components:
             component.render(w=self.w)
-        self.w(u'</div>')
         self.w(u'</nav>')