Add visual button presets, jump targets and menu controls

templates/admin/editor.html.twig

@@ -4,7 +4,7 @@
 {% set listRoute = area ? 'admin_partials' : (page.type == 'post' ? 'admin_posts' : 'admin_pages') %}
 {% block title %}{{ subject.title }} bearbeiten{% endblock %}
 {% block body_class %}editor-body{% endblock %}
-{% block styles %}<link rel="stylesheet" href="/assets/editor.css?v={{ kant_version() }}">{% endblock %}
+{% block styles %}<link rel="stylesheet" href="/assets/editor.css?v={{ kant_version() }}"><link rel="stylesheet" href="/assets/buttons.css?v={{ kant_version() }}"><link rel="stylesheet" href="/assets/button-controls.css?v={{ kant_version() }}"><link rel="stylesheet" href="/assets/color-control.css?v={{ kant_version() }}">{% endblock %}
 {% block scripts %}<script type="module" src="/assets/editor.js?v={{ kant_version() }}"></script>{% endblock %}
 {% block body %}
 {# The API base decides what is edited. An area is shared, so it has no draft and no