Add iframe support

[reOiL]

Martor broke css style (not in admin). Does it possible to make iframe render, like django-summernote?

Code:

<form method="post" action="{% url 'index' %}">
    {% csrf_token %}
    {{ form.media }}
    {{ form|crispy }}
    <div class="form-group">
        <button class="btn btn-outline-success btn-block" type="submit">Post it</button>
    </div>
</form>

---

Without martor

With martor

With martor without media