better icons

www/index.html

@@ -55,11 +55,11 @@
         <input class="form-control mr-sm-2" type="search" placeholder="Quick Search" aria-label="Search" />
       </form>
       <div>
-        <button type="button" class="autodoc_ajax_off btn btn-secondary">
-          <i class="fas fa-times"></i>
+        <button type="button" class="autodoc_ajax_off btn btn-secondary disabled">
+          <i class="fas fa-signal"></i>
         </button>
-        <button type="button" class="autodoc_ajax_on d-none btn btn-primary">
-          <i class="fas fa-times"></i>
+        <button type="button" class="autodoc_ajax_on d-none btn btn-primary disabled">
+          <i class="fas fa-spinner"></i>
         </button>
       </div>
     </div>