Refactor authentication system (#2602)

Make auth configuration available via UI, remove FOSUserBundle and SAML-Bundle dependency

templates/security/login.html.twig

@@ -0,0 +1,57 @@
+{% extends '@AdminLTE/FOSUserBundle/Security/login.html.twig' %}
+
+{% block logo_login %}{% include 'partials/logo_login.html.twig' %}{% endblock %}
+{% block title %}{{- get_title() -}}{% endblock %}
+
+{% block head %}
+    {{ parent() }}
+    {% include 'partials/head.html.twig' %}
+    {% set event = trigger(constant('App\\Event\\ThemeEvent::HTML_HEAD')) %}
+    {{ event.content|raw }}
+{% endblock %}
+
+{% block stylesheets %}
+    {{ encore_entry_link_tags('app') }}
+    {% set event = trigger(constant('App\\Event\\ThemeEvent::STYLESHEET')) %}
+    {{ event.content|raw }}
+{% endblock %}
+
+{% block javascripts %}
+    {{ encore_entry_script_tags('app') }}
+    {% set event = trigger(constant('App\\Event\\ThemeEvent::JAVASCRIPT')) %}
+    {{ event.content|raw }}
+{% endblock %}
+
+{% block login_social_auth %}
+    {% if kimai_config.samlActive %}
+        {% set class = 'btn-primary' %}
+        {% if kimai_config.loginFormActive %}
+            {% set class = 'btn-google' %}
+            <hr>
+        {% endif %}
+        <a href="{{ path('saml_login') }}" class="btn btn-block {{ class }}">
+            {{ kimai_config.samlTitle|trans }}
+        </a>
+        <br>
+    {% endif %}
+{% endblock %}
+
+{% block login_form %}
+    {% if kimai_config.loginFormActive %}
+        {{ parent() }}
+    {% endif %}
+{% endblock %}
+
+{% block login_actions %}
+    {% if kimai_config.passwordResetActive %}
+        <a href="{{ path('fos_user_resetting_request') }}">
+            {{ 'I forgot my password'|trans({}, 'AdminLTEBundle') }}
+        </a>
+        <br>
+    {% endif %}
+    {% if kimai_config.selfRegistrationActive %}
+        <a href="{{ path('fos_user_registration_register') }}">
+            {{ 'Register a new account'|trans({}, 'AdminLTEBundle') }}
+        </a>
+    {% endif %}
+{% endblock %}