Add additional class to headers to give greater specificity

wagtail/wagtailadmin/templates/wagtailadmin/pages/create.html

@@ -7,11 +7,11 @@
 
 {% block content %}
 
-    <header class="merged tab-merged nice-padding">
+    <header class="merged tab-merged">
         {% explorer_breadcrumb parent_page include_self=1 %}
 
         <div class="row row-flush">
-            <div class="left col9">
+            <div class="left col9 header-title">
                 <h1 class="icon icon-doc-empty-inverse">{% trans 'New' %} <span>{{ content_type.model_class.get_verbose_name }}</span></h1>
             </div>
         </div>

wagtail/wagtailadmin/templates/wagtailadmin/pages/edit.html

@@ -7,11 +7,11 @@
 
 {% block content %}
     {% page_permissions page as page_perms %}
-    <header class="merged tab-merged nice-padding">
+    <header class="merged tab-merged">
         {% explorer_breadcrumb page %}
 
         <div class="row row-flush">
-            <div class="left col9">
+            <div class="left col9 header-title">
                 <h1 class="icon icon-doc-empty-inverse">{% blocktrans with title=page.get_admin_display_title page_type=content_type.model_class.get_verbose_name %}Editing {{ page_type }} <span>{{ title }}</span>{% endblocktrans %}</h1>
             </div>
             <div class="right col3">

wagtail/wagtailadmin/templates/wagtailadmin/shared/header.html

@@ -20,7 +20,7 @@
 <header class="nice-padding {% if merged %}merged{% endif %} {% if tabbed %}tab-merged{% endif %} {% if search_form %}hasform{% endif %}">
     <div class="row">
         <div class="left">
-            <div class="col">
+            <div class="col header-title">
                 <h1 class="icon icon-{{ icon }}">{{ title }}{% if subtitle %} <span>{{ subtitle }}</span>{% endif %}</h1>
             </div>
             {% if search_url %}

wagtail/wagtailsnippets/templates/wagtailsnippets/snippets/type_index.html

@@ -17,7 +17,7 @@
 
     <header class="nice-padding">
         <div class="row row-flush">
-            <div class="left col9">
+            <div class="left col9 header-title">
                 <h1 class="icon icon-snippet">{% blocktrans with snippet_type_name_plural=model_opts.verbose_name_plural|capfirst %}Snippets <span>{{ snippet_type_name_plural }}</span>{% endblocktrans %}</h1>
 
                 {% if is_searchable %}