Update todo example component.

Author: adamghill

example/unicorn/templates/unicorn/todo.html

@@ -12,7 +12,7 @@
         <p class="control">
             <span>
             <button unicorn:click="add" class="button is-info">Add</button>&nbsp;&nbsp;
-            <button unicorn:click="reset" class="button is-danger" {% if not tasks %}disabled{% endif %} style="border-radius: 4px;">Clear all tasks</button>
+            <button unicorn:click="$reset" class="button is-danger" {% if not tasks %}disabled{% endif %} style="border-radius: 4px;">Clear all tasks</button>
         </span>
 
             <span u:loading style="position: relative; left: 6px;">