[SONARCLOUD] Compliant icon fonts usage

Signed-off-by: Akash Ravi <akashkravi@gmail.com>

Author: techtocore

extension/js/templates/list_item.html

@@ -1,7 +1,7 @@
 <div class="list_item">
     <div class="row one">
         <div class="col-sm-9 two">
-            <i class="list_icon fa"></i> &nbsp;
+            <i class="list_icon fa" aria-hidden="true" /> &nbsp;
             <span class="value-name"></span>
         </div>
         <div class="col-sm-3 three">

extension/js/templates/sidebar.html

@@ -3,7 +3,7 @@
         <div id="loadingview">
             <h2 id="loadingtext">Loading</h2>
             &nbsp;&nbsp;
-            <i class="fa-spinner fa-spin fa"></i>
+            <i class="fa-spinner fa-spin fa" aria-hidden="true" />
             <hr>
         </div>
         <div id="packageview">
@@ -33,9 +33,9 @@ <h2>Packages To Install</h2>
                         <h2>Installed Packages</h2>
                     </div>
                     <div class="col-sm-2">
-                        <i class="faicon fa fa-wrench" id="updatebtn"></i>
+                        <i class="faicon fa fa-wrench" id="updatebtn" aria-hidden="true" />
                         &nbsp;
-                        <i class="faicon fa fa-trash-o" id="deletebtn"></i>
+                        <i class="faicon fa fa-trash-o" id="deletebtn" aria-hidden="true" />
                     </div>
                 </div>
                 <br>