Merge pull request #506 from maoxuner/master

fix length_is filter deprecation

simpleui/templates/admin/includes/fieldset.html

@@ -5,11 +5,11 @@
         <div class="description">{{ fieldset.description|safe }}</div>
     {% endif %}
     {% for line in fieldset %}
-        <div class="form-row{% if line.fields|length_is:'1' and line.errors %} errors{% endif %}{% if not line.has_visible_field %} hidden{% endif %}{% for field in line %}{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% endfor %}">
-            {% if line.fields|length_is:'1' %}{{ line.errors }}{% endif %}
+        <div class="form-row{% if line.fields|length == 1 and line.errors %} errors{% endif %}{% if not line.has_visible_field %} hidden{% endif %}{% for field in line %}{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% endfor %}">
+            {% if line.fields|length == 1 %}{{ line.errors }}{% endif %}
             {% for field in line %}
-                <div{% if not line.fields|length_is:'1' %} class="fieldBox{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% endif %}"{% elif field.is_checkbox %} class="checkbox-row"{% endif %}>
-                    {% if not line.fields|length_is:'1' and not field.is_readonly %}{{ field.errors }}{% endif %}
+                <div{% if not line.fields|length == 1 %} class="fieldBox{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% endif %}"{% elif field.is_checkbox %} class="checkbox-row"{% endif %}>
+                    {% if not line.fields|length == 1 and not field.is_readonly %}{{ field.errors }}{% endif %}
                     {% if field.is_checkbox %}
                         {{ field.field }}{{ field.label_tag }}
                     {% else %}