Always use the same styling for page headings

In order to ensure a consistent look to the site, always use the same css
for page headings, don't require each section to define it's own css.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

themes/beautifulhugo/layouts/partials/header.html

@@ -21,7 +21,7 @@
         <div class="container">
           <div class="row">
             <div class="col-lg-8 col-lg-offset-2 col-md-10 col-md-offset-1">
-              <div class="{{ .Type }}-heading">
+              <div class="page-heading">
                 <h1>{{ with $.Scratch.Get "title" }}{{.}}{{ else }}<br/>{{ end }}</h1>
                   {{ if $subtitle }}
                     {{ if eq .Type "page" }}
@@ -46,7 +46,7 @@
       <div class="container">
         <div class="row">
           <div class="col-lg-8 col-lg-offset-2 col-md-10 col-md-offset-1">
-            <div class="{{ .Type }}-heading">
+            <div class="page-heading">
               <h1>{{ with $.Scratch.Get "title" }}{{.}}{{ else }}<br/>{{ end }}</h1>
                 {{ if $subtitle }}
                   {{ if eq .Type "page" }}