Build subscribe checkbox in register mako without html backend helper

lib/galaxy/web/form_builder.py

@@ -74,6 +74,7 @@ class CheckboxField(BaseField):
     def is_checked(value):
         if value in [True, "true"]:
             return True
+        return False
 
     def to_dict(self):
         d = super(CheckboxField, self).to_dict()

templates/user/register.mako

@@ -59,8 +59,6 @@ def inherit(context):
     <%
         if form_action is None:
             form_action = h.url_for( controller='user', action='create', cntrller=cntrller )
-        from galaxy.web.form_builder import CheckboxField
-        subscribe_check_box = CheckboxField( 'subscribe' )
     %>
 
     <script type="text/javascript">
@@ -169,10 +167,7 @@ def inherit(context):
             %if trans.app.config.smtp_server and trans.app.config.mailing_join_addr:
                 <div class="form-row">
                     <label>Subscribe to mailing list:</label>
-                    %if subscribe_checked:
-                        <% subscribe_check_box.checked = True %>
-                    %endif
-                    ${subscribe_check_box.get_html()}
+                    <input type="checkbox" id="subscribe" name="subscribe" value="true" ${"checked" if subscribe_checked else ""} >
                     <p>See <a href="https://galaxyproject.org/mailing-lists/" target="_blank">
                     all Galaxy project mailing lists</a>.</p>
                 </div>