fix(sidebar): contact icons not stacking (#1224)

Fixes #1224

_includes/sidebar.html

@@ -59,7 +59,6 @@
       {% endif %}
     {% endunless %}
 
-    <address class="d-flex mb-0">
     {% for entry in site.data.contact %}
       {% case entry.type %}
         {% when 'github', 'twitter' %}
@@ -100,7 +99,6 @@
         </a>
       {% endif %}
     {% endfor %}
-    </address>
   </div>
   <!-- .sidebar-bottom -->
 </aside>

_sass/addon/commons.scss

@@ -830,8 +830,8 @@ $btn-mb: 0.5rem;
   }
 
   .sidebar-bottom {
-    @include pl-pr(2rem);
-
+    padding-left: 2rem;
+    padding-right: 1rem;
     margin-bottom: 1.5rem;
 
     %button {