More explicit sidebar item sorting

Author: chrisglein

_includes/sidebar.html

@@ -13,15 +13,13 @@
 
     {% comment %}
       The code below dynamically generates a sidebar nav of pages with
-      `layout: page` in the front-matter. See readme for usage.
+      `sidebar_order` set in the front-matter.
     {% endcomment %}
 
-    {% assign pages_list = site.pages | sort:"url" %}
+    {% assign pages_list = site.pages | sort:"sidebar_order" %}
     {% for node in pages_list %}
-      {% if node.title != null %}
-        {% if node.layout == "page" && node.url != 'posts.html' %}
-          <a class="sidebar-nav-item{% if page.url == node.url %} active{% endif %}" href="{{ node.url | absolute_url }}">{{ node.title }}</a>
-        {% endif %}
+      {% if node.sidebar_order != null %}
+        <a class="sidebar-nav-item{% if page.url == node.url %} active{% endif %}" href="{{ node.url | absolute_url }}">{{ node.title }}</a>
       {% endif %}
     {% endfor %}
 

about.md

@@ -1,6 +1,7 @@
 ---
 layout: page
 title: About
+sidebar_order: 999
 ---
 
 Chris Glein is a Seattle area [game designer](https://boardgamegeek.com/boardgamedesigner/120507/chris-glein) and [artist](https://boardgamegeek.com/boardgameartist/120507/chris-glein). You can find him monthly with the Seattle Tabletop Game Designers at [Blue Highway Games](https://www.bluehighwaygames.com/events/events-schedule/)'s industry meet up, playing and creating all sorts of game prototypes. He is endlessly looking for new and interesting ways to pair theme and mechanics so that he has an excuse to draw more pictures and put them on cards.

games.md

@@ -3,6 +3,7 @@ title: Game Design
 description: My game design projects
 layout: page
 thumbsurl: media/thumbnails
+sidebar_order: 1
 ---
 <style type="text/css" rel="stylesheet">
 img {