appearance tweaks

backend/app/templates/_postnav.html

@@ -0,0 +1,14 @@
+	<div>
+	{% if prev_url %}
+	<a class="button" href="{{ prev_url }}">Newer</a>
+	{% else %}
+	<a class="button" aria-disabled=true>Newer</a>
+	{% endif %}
+
+	{% if next_url %}
+	<a class="button" href="{{ next_url }}">Older</a>
+	{% else %}
+	<a class="button" aria-disabled=true>Older</a>
+	{% endif %}
+	</div>
+