More style cleanup and housekeeping

_includes/footer.html

@@ -14,7 +14,7 @@
 </div><!-- /.google-ads -->
 {% endif %}
 
-<div class="follow">
+<div class="page__footer-follow">
   <ul>
     <li><strong>{{ site.data.ui-text[site.locale].follow_label }}</strong></li>
     {% if site.twitter.username %}
@@ -27,4 +27,4 @@
   </ul>
 </div>
 
-<div class="copyright">&copy; {{ site.time | date: '%Y' }} {{ site.name | default: site.title }}. {{ site.data.ui-text[site.locale].powered_by }} <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.</div>
+<div class="page__footer-copyright">&copy; {{ site.time | date: '%Y' }} {{ site.name | default: site.title }}. {{ site.data.ui-text[site.locale].powered_by }} <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.</div>

_includes/social-share.html

@@ -1,5 +1,7 @@
 <section class="page__share">
-  <h4 class="page__share-title">{{ site.data.ui-text[site.locale].share_on_label }}</h4>
+  {% if site.data.ui-text[site.locale].share_on_label %}
+    <h4 class="page__share-title">{{ site.data.ui-text[site.locale].share_on_label }}</h4>
+  {% endif %}
   <a href="https://twitter.com/intent/tweet?text={{ base_path }}{{ page.url }}" class="btn btn--twitter" title="Share on Twitter"><i class="fa fa-twitter"></i><span> Twitter</span></a>
   <a href="https://www.facebook.com/sharer/sharer.php?u={{ base_path }}{{ page.url }}" class="btn btn--facebook" title="Share on Facebook"><i class="fa fa-facebook"></i><span> Facebook</span></a>
   <a href="https://plus.google.com/share?url={{ base_path }}{{ page.url }}" class="btn btn--google-plus" title="Share on Google Plus"><i class="fa fa-google-plus"></i><span> Google+</span></a>