Add template for form fields

Is mostly universal, yet fields that require extra classes (like f.e. select2) need extra logic.
Meaning that with few tweaks this template has a potential to fix all add/edit templates in /seeddb.
Will finish and showcase this in a separate PR

fixup

python/nav/web/templates/seeddb/_form_fields.html

@@ -0,0 +1,18 @@
+{% for field in form %}
+	<div id="div_id_{{ field.name }}"
+	     class="ctrlHolder {% if field.errors %}error{% endif %}"
+	>
+		<label for="id_{{ field.name }}"
+		       class="{% if field.field.required %}requiredField{% endif %}"
+		>
+			{{ field.label.title }}
+			{% if field.field.required %}<span class="asteriskField">*</span>{% endif %}
+		</label>
+		{{ field }}
+		{% for error in field.field.errors %}
+			<small id="error_{{ forloop.counter }}_id_{{ field.name }}" class="error">
+				{{ error }}
+			</small>
+		{% endfor %}
+	</div>
+{% endfor %}

python/nav/web/templates/seeddb/edit.html

@@ -41,14 +41,15 @@ <h4>{{ title }}
       <form class="seeddb-edit" action="" method="post">
         <fieldset>
           <legend>Attributes</legend>
-            {% if form.no_crispy %}
-                {% block formfields %}
-                {% endblock %}
-            {% else %}
-                {% block crispyfields %}
-                    {{ form|crispy }}
-                {% endblock %}
-            {% endif %}
+	        {% if form.no_crispy %}
+		        {% block formfields %}
+			        {% include "seeddb/_form_fields.html" %}
+		        {% endblock %}
+	        {% else %}
+		        {% block crispyfields %}
+			        {{ form|crispy }}
+		        {% endblock %}
+	        {% endif %}
         </fieldset>
         <input type="submit" name="submit" value="Save {{ verbose_name }}" class="submit button small left" id="submit-id-submit">
       </form>