add checkbox and help text modifier classes

opentech/apply/funds/templates/funds/includes/field.html

@@ -2,7 +2,7 @@
 
 {% with widget_type=field|widget_type field_type=field|field_type %}
 
-<div class="form__group {% if field.errors %}form__error{% endif %}">
+<div class="form__group {% if widget_type == 'checkbox_input' %}form__group--checkbox{% endif %} {% if field.help_text %}form__group--wrap{% endif %}{% if field.errors %}form__error{% endif %}">
     {% if widget_type == 'clearable_file_input' or widget_type == 'multi_file_input' %}
         <span class="form__question">{{ field.label }}</span>
         <label for="{{ field.id_for_label }}" class="form__question form__question--{{ field_type }} {{ widget_type }}" {% if field.field.required %}required{% endif %}>