app/bundles/FormBundle/Resources/views/Action/_option.html.twig

{#
  Variables
    - action
    - type
    - isStandalone
    - formId
#}
{% set class = action.allowCampaignForm is not defined or action.allowCampaignForm is empty ? 'action-standalone-only' : '' %}
{% if ( action.allowCampaignForm is not defined or action.allowCampaignForm is empty) and not isStandalone %}
    {% set class = class ~ ' hide' %}
{% endif %}
<option id="action_{{ type }}"
        class="{{ class }}"
        data-toggle="ajaxmodal"
        data-target="#formComponentModal"
        data-href="{{ path('mautic_formaction_action', {
            'objectAction': 'new',
            'type': type,
            'tmpl': 'action',
            'formId': formId,
        }) }}">{{ action['label']|trans }}</option>