replace the edit button with an edit icon

devices/templates/devices/device_details.html

@@ -1,13 +1,6 @@
 {% extends "core/base.html" %}
 {% block section_title %}{{ device.name }}{% endblock %}
 {% block content %}
-<div class="row mb-3">
-    <div class="col">
-        <form action="{% url 'device_update' pk %}">
-            <input type="submit" value="Edit Device" class="btn btn-primary">
-        </form>
-    </div>
-</div>
 <div class="row">
     <div class="col mt-3">
     {% block device_details %}

devices/templates/devices/device_details_block.html

@@ -37,5 +37,6 @@
                 <td>{{ device.installation_date }}</td>
             </tr>
         </table>
+            <a href="{% url 'device_update' pk %}" class="edit" title="Edit" data-toggle="tooltip"><i class="material-icons">edit</i></a>
     </div>
 </div>