Merge #938: Re-add empty author sidebar to fix alignment

fda7ea5 Re-add empty author sidebar to fix aligment (stickies-v)

Pull request description:

  Prior to #863, an `article-author-side` sidebar ensured the main content was centered. This commit reintroduces the (empty) sidebar that #863 removed to fix the layout.

  I have very little experience working with html/css so if there are more elegant solutions I'm open to that too, but this seems to revert to the old behaviour in a quite simple way.

  Before:
  ![image](https://user-images.githubusercontent.com/69010457/204641428-01277e90-66f8-400d-a500-9746144d5934.png)

  After:
  ![image](https://user-images.githubusercontent.com/69010457/204641455-2e7240df-499d-4524-b4d5-20bde66c66b6.png)

Top commit has no ACKs.

Tree-SHA512: e7c33a22359b2245918271d5cffc62f658af62c75eeedc986b743ef683f52b19e61a5bd14662afa5c466e3cbc350bfd40c66a050ff42e40da72774235e8ebe5b

Author: fanquake

_layouts/home.html

@@ -29,6 +29,7 @@
 {% endif %}
 
 <div id="main" role="main">
+  <div class="article-author-side">&nbsp;</div>
   <div id="index">
     {% assign navigation = site.data.navigation[page.lang] %}
     <h3><a href="{{ navigation.blog.url }}">Recent Posts</a></h3>

_layouts/page.html

@@ -29,6 +29,7 @@
 {% endif %}
 
 <div id="main" role="main">
+  <div class="article-author-side">&nbsp;</div>
   <article class="page">
     <h1>{{ page.title | xml_escape }}</h1>
     <div class="article-wrap">

_layouts/post-index.html

@@ -29,6 +29,7 @@
 {% endif %}
 
 <div id="main" role="main">
+  <div class="article-author-side">&nbsp;</div>
   <div id="index">
     <h1>{{ page.title | xml_escape }}</h1>
     {% capture written_year %}'None'{% endcapture %}

_layouts/post.html

@@ -29,6 +29,7 @@
 {% endif %}
 
 <div id="main" role="main">
+  <div class="article-author-side">&nbsp;</div>
   <article class="post h-entry">
     <div class="headline-wrap">
       {% if page.link %}