inventory.html: Brought UI up to date.

Updated template to match the style of the rest of the templates
that were updated a year ago when the project switched to using
Semantic-UI.

puppetboard/templates/inventory.html

@@ -1,21 +1,9 @@
 {% extends 'layout.html' %}
 {% block content %}
-<div class="alert alert-info">
-  PuppetDB currently only returns active nodes.
+<div class="ui fluid icon input hide" style="margin-bottom:20px">
+  <input autofocus="autofocus" class="filter-table" placeholder="Type here to filter...">
 </div>
-      {% with messages = get_flashed_messages(with_categories=true) %}
-      {% if messages %}
-      {% for category, message in messages %}
-        <div class="alert alert-{{category}}">
-          {{message}}
-        </div>
-      {% endfor %}
-      {% endif %}
-      {% endwith %}
-<div class="hide" style="margin-bottom:20px">
-<input autofocus="autofocus" style="width:100%" type="text" class="filter-table input-medium search-query" placeholder="Type here to filter">
-</div>
-<table class='inventory table table-striped table-condensed'>
+<table class='ui compact basic table inventory'>
   <thead>
     <tr>
       {% for description in fact_desc %}