Add parent nav to blog posts and announcements

Author: kborchers

_layouts/announcement.html

@@ -9,6 +9,16 @@
 
 		<main class="main_post-layout">
 
+			<nav class="page-sub-nav">
+
+				<div class="page-sub-nav-content">
+
+					<a class="page-parent-link" href="{{ site.url }}{{ site.baseurl }}/announcements/"><svg class="page-parent-link-icon" viewBox="0 0 24 24"><path d="M15.41 16.09l-4.58-4.59 4.58-4.59L14 5.5l-6 6 6 6z"/></svg>Announcements</a>
+
+				</div>
+
+			</nav>
+
 			<article class="main-content_post-layout">
 
 				<header class="page-header_post-layout">

_layouts/post.html

@@ -9,6 +9,16 @@
 
 		<main class="main_post-layout">
 
+			<nav class="page-sub-nav">
+
+				<div class="page-sub-nav-content">
+
+					<a class="page-parent-link" href="{{ site.url }}{{ site.baseurl }}/blog/"><svg class="page-parent-link-icon" viewBox="0 0 24 24"><path d="M15.41 16.09l-4.58-4.59 4.58-4.59L14 5.5l-6 6 6 6z"/></svg>Blog</a>
+
+				</div>
+
+			</nav>
+
 			<article class="main-content_post-layout">
 
 				<header class="page-header_post-layout">