Remove custom page title

src/_includes/blog/blognav.njk

@@ -1,10 +1,17 @@
 <aside class="right-sidebar">
     <nav class="blog__nav">
-        <h2 class="blog__nav--title">Blog Navigation</h2>
+        <h2 class="blog__nav--title">Navigation</h2>
         <ul class="blog__nav--links">
             {% for page in collections["blog pages"] %}
-                <li><a href="{{ page.url }}">{{ page.data.blogNav }}</a></li>
+                <li><a href="{{ page.url }}">{{ page.data.blogNav or page.data.title }}</a></li>
             {% endfor %}
         </ul>
     </nav>
-</aside>
+</aside>
+
+<style>
+    .blog__nav {
+        position: sticky;
+        top: 4rem;
+    }
+</style>