clean up font awesome icons with aria-hidden and titles as necessary

Author: jwcooper

_includes/download/blinka.html

@@ -12,7 +12,7 @@ <h3>Adafruit Blinka Installation</h3>
     so much because they all happen underneath the adafruit_blinka layer.
   </p>
   <div>
-      <a class="download-button" href="{{ page.download_instructions }}">INSTALLATION INSTRUCTIONS<i class="fas fa-arrow-circle-right"></i></a>
+      <a class="download-button" href="{{ page.download_instructions }}">INSTALLATION INSTRUCTIONS<i class="fas fa-arrow-circle-right" aria-hidden="true"></i></a>
     <div class="clear"></div>
   </div>
 </div>

_includes/download/board.html

@@ -55,7 +55,7 @@ <h3>CircuitPython {{ version.version }}</h3>
       </label>
       <div class="download-buttons">
       {% for file in version.files['en_US'] %}
-        <a class="download-button {% if version.stable %}stable{% else %}unstable{% endif %} {{ file | slice: -3, 3 }}" href="{{ file }}">DOWNLOAD {{ file | slice: -4, 4 | upcase }} NOW <i class="fas fa-download"></i></a>
+        <a class="download-button {% if version.stable %}stable{% else %}unstable{% endif %} {{ file | slice: -3, 3 }}" href="{{ file }}">DOWNLOAD {{ file | slice: -4, 4 | upcase }} NOW <i class="fas fa-download" aria-hidden="true"></i></a>
       {% endfor %}
       </div>
     </div>
@@ -70,7 +70,7 @@ <h3>Absolute Newest</h3>
     the absolute latest and are feeling risky.
   </p>
   <div>
-      <a class="download-button-unrecommended" href="https://adafruit-circuit-python.s3.amazonaws.com/index.html?prefix=bin/{{ page.board_id }}/">BROWSE S3<i class="fas fa-arrow-circle-right"></i></a>
+      <a class="download-button-unrecommended" href="https://adafruit-circuit-python.s3.amazonaws.com/index.html?prefix=bin/{{ page.board_id }}/">BROWSE S3<i class="fas fa-arrow-circle-right" aria-hidden="true"></i></a>
     <div class="clear"></div>
   </div>
 </div>
@@ -81,7 +81,7 @@ <h3>Past Releases</h3>
     the latest stable otherwise.
   </p>
   <div>
-      <a class="download-button-unrecommended" href="https://github.com/adafruit/circuitpython/releases">BROWSE GITHUB<i class="fab fa-github"></i></a>
+      <a class="download-button-unrecommended" href="https://github.com/adafruit/circuitpython/releases">BROWSE GITHUB<i class="fab fa-github" aria-hidden="true"></i></a>
     <div class="clear"></div>
   </div>
 </div>

assets/javascript/downloads.js

@@ -263,7 +263,7 @@ function shouldDisplayDownload(download, displayedManufacturers, displayedFeatur
 }
 
 function appendFilterTag(type, name) {
-  var tagHtml = "<span class='tag'><i class='fas fa-times tag-remove' ";
+  var tagHtml = "<span class='tag'><i class='fas fa-times tag-remove' title='Remove Filtered Option'";
   tagHtml += "data-type='" + type + "' ";
   tagHtml += "data-name='" + name + "'></i>";
   tagHtml += name + "</span>";

blinka.html

@@ -13,14 +13,14 @@ <h1>Blinka</h1>
       </label>
     </div>
     <div class="downloads-filter">
-      <button class="filter" title="Filter Boards"><i class="fas fa-sliders-h"></i></button>
+      <button class="filter" title="Filter Boards"><i class="fas fa-sliders-h" aria-hidden="true"></i></button>
     </div>
     <div class="downloads-filter-tags">
     </div>
   </div>
   <div class="downloads-filter-content">
     <div class="filter-buttons">
-      <button class="save-changes" title="Close and Save Changes"><i class="fas fa-times"></i></button>
+      <button class="save-changes" title="Close and Save Changes"><i class="fas fa-times" aria-hidden="true"></i></button>
     </div>
     <div>
       <div class="manufacturers">

downloads.html

@@ -13,14 +13,14 @@ <h1>Downloads</h1>
       </label>
     </div>
     <div class="downloads-filter">
-      <button class="filter" title="Filter Boards"><i class="fas fa-sliders-h"></i></button>
+      <button class="filter" title="Filter Boards"><i class="fas fa-sliders-h" aria-hidden="true"></i></button>
     </div>
     <div class="downloads-filter-tags">
     </div>
   </div>
   <div class="downloads-filter-content">
     <div class="filter-buttons">
-      <button class="save-changes" title="Close and Save Changes"><i class="fas fa-times"></i></button>
+      <button class="save-changes" title="Close and Save Changes"><i class="fas fa-times" aria-hidden="true"></i></button>
     </div>
     <div>
       <div class="manufacturers">