A super huge improvement in search.

- Added a cleanup button within input form.
- Optimized TopBar responsive effect(for search layout).
- Redesign the search results layout.

_includes/sidebar.html

@@ -4,8 +4,8 @@
   MIT License
 -->
 
-<div id="nav-wrap">
-  <div id="profile-wrap" class="d-flex flex-column">
+<div id="nav-wrapper">
+  <div id="profile-wrapper" class="d-flex flex-column">
     <div id="avatar" class="d-flex justify-content-center">
       <a href="{{ site.baseurl }}/" alt="avatar">
         {% assign avatar = site.avatar %}
@@ -41,7 +41,7 @@
       {% if item.url == page_urls.last or
         item.name == "Home" and page.layout == "home" %}active{% endif %}">
       <a href="{{ ref }}" class="nav-link d-flex justify-content-center align-items-center w-100">
-        <i class="fa-fw {{ item.icon }} ml-3 mr-4 hidden"></i>
+        <i class="fa-fw {{ item.icon }} ml-3 mr-4 unloaded"></i>
         <span>{{ item.name | upcase }}</span>
       </a>
     </li> <!-- .nav-item -->
@@ -49,7 +49,7 @@
 
   </ul> <!-- ul.nav.flex-column -->
 
-</div><!-- #nav-wrap -->
+</div><!-- #nav-wrapper -->
 
 <div class="contact d-flex justify-content-around mt-4">
   <a href="https://github.com/{{ site.github.username }}" target="_blank">