upgraded to symfony 4 #74 (#81)

templates/bundles/AvanzuAdminThemeBundle/Navbar/user.html.twig

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+{# User Account: style can be found in dropdown.less #}
+{% import "@AvanzuAdminTheme/layout/macros.html.twig" as macro %}
+<li class="dropdown user user-menu">
+    <a href="#" class="dropdown-toggle" data-toggle="dropdown">
+        {{ macro.avatar(user.avatar, user.username, 'user-image') }}
+        <span class="hidden-xs">{{ user.name }}</span>
+    </a>
+    <ul class="dropdown-menu">
+        <!-- User image -->
+        <li class="user-header">
+            {{ macro.avatar(user.avatar, user.username) }}
+            <p>
+                {{user.name}}
+                <small>{{user.title}}</small>
+            </p>
+        </li>
+        {#
+        <!-- Menu Body -->
+        <li class="user-body">
+            <div class="col-xs-4 text-center">
+            </div>
+            <div class="col-xs-4 text-center">
+            </div>
+            <div class="col-xs-4 text-center">
+            </div>
+        </li>
+        #}
+        <!-- Menu Footer-->
+        <li class="user-footer">
+            <div class="pull-left">
+                <a href="{{ path('user_profile', {'username' : user.username}) }}" class="btn btn-default btn-flat">{{ 'label.user_profile'|trans }}</a>
+            </div>
+            <div class="pull-right">
+                <a href="{{ logout_path() }}" class="btn btn-default btn-flat">{{ 'label.logout'|trans }}</a>
+            </div>
+        </li>
+    </ul>
+</li>

templates/bundles/AvanzuAdminThemeBundle/Partials/_head.html.twig

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+<meta charset="utf-8">
+<meta http-equiv="X-UA-Compatible" content="IE=edge">
+<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
+<link rel="stylesheet" href="{{ asset('theme/bootstrap/css/bootstrap.min.css') }}">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
+{#<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ionicons/2.0.1/css/ionicons.min.css">#}
+<link rel="stylesheet" href="{{ asset('theme/dist/css/AdminLTE.min.css') }}">
+<link rel="stylesheet" href="{{ asset("theme/dist/css/skins/" ~ avanzu_admin_context.skin|default('skin-blue-light') ~ ".min.css") }}">
+<!--[if lt IE 9]>
+<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
+<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
+<![endif]-->

templates/bundles/TwigBundle/Exception/error.html.twig

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+{#
+    This template is used to render any error different from 403, 404 and 500.
+
+    This is the simplest way to customize error pages in Symfony applications.
+    In case you need it, you can also hook into the internal exception handling
+    made by Symfony. This allows you to perform advanced tasks and even recover
+    your application from some errors.
+    See http://symfony.com/doc/current/cookbook/controller/error_pages.html
+#}
+
+{% extends 'base.html.twig' %}
+
+{% block body_id 'error' %}
+
+{% block main %}
+    <h1 class="text-danger">{{ 'http_error.name'|trans({ '%status_code%': status_code }) }}</h1>
+
+    <p class="lead">
+        {{ 'http_error.description'|trans({ '%status_code%': status_code }) }}
+    </p>
+    <p>
+        {{ 'http_error.suggestion'|trans({ '%url%': path('homepage') })|raw }}
+    </p>
+{% endblock %}
+
+{% block sidebar %}
+    {{ parent() }}
+{% endblock %}

templates/bundles/TwigBundle/Exception/error403.html.twig

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+{#
+    This template is used to render errors of type HTTP 403 (Forbidden)
+
+    This is the simplest way to customize error pages in Symfony applications.
+    In case you need it, you can also hook into the internal exception handling
+    made by Symfony. This allows you to perform advanced tasks and even recover
+    your application from some errors.
+    See http://symfony.com/doc/current/cookbook/controller/error_pages.html
+#}
+
+{% extends 'base.html.twig' %}
+
+{% block body_id 'error' %}
+
+{% block main %}
+    <h1 class="text-danger"><i class="fa fa-unlock-alt"></i> {{ 'http_error.name'|trans({ '%status_code%': 403 }) }}</h1>
+
+    <p class="lead">
+        {{ 'http_error_403.description'|trans }}
+    </p>
+    <p>
+        {{ 'http_error_403.suggestion'|trans }}
+    </p>
+{% endblock %}
+
+{% block sidebar %}
+    {{ parent() }}
+{% endblock %}

templates/bundles/TwigBundle/Exception/error404.html.twig

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+{#
+    This template is used to render errors of type HTTP 404 (Not Found)
+
+    This is the simplest way to customize error pages in Symfony applications.
+    In case you need it, you can also hook into the internal exception handling
+    made by Symfony. This allows you to perform advanced tasks and even recover
+    your application from some errors.
+    See http://symfony.com/doc/current/cookbook/controller/error_pages.html
+#}
+
+{% extends 'base.html.twig' %}
+
+{% block body_id 'error' %}
+
+{% block main %}
+    <h1 class="text-danger">{{ 'http_error.name'|trans({ '%status_code%': 404 }) }}</h1>
+
+    <p class="lead">
+        {{ 'http_error_404.description'|trans }}
+    </p>
+    <p>
+        {{ 'http_error_404.suggestion'|trans({ '%url%': path('homepage') })|raw }}
+    </p>
+{% endblock %}
+
+{% block sidebar %}
+    {{ parent() }}
+{% endblock %}

templates/bundles/TwigBundle/Exception/error500.html.twig

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+{#
+    This template is used to render errors of type HTTP 500 (Internal Server Error)
+
+    This is the simplest way to customize error pages in Symfony applications.
+    In case you need it, you can also hook into the internal exception handling
+    made by Symfony. This allows you to perform advanced tasks and even recover
+    your application from some errors.
+    See http://symfony.com/doc/current/cookbook/controller/error_pages.html
+#}
+
+{% extends 'base.html.twig' %}
+
+{% block body_id 'error' %}
+
+{% block main %}
+    <h1 class="text-danger">{{ 'http_error.name'|trans({ '%status_code%': 500 }) }}</h1>
+
+    <p class="lead">
+        {{ 'http_error_500.description'|trans }}
+    </p>
+    <p>
+        {{ 'http_error_500.suggestion'|trans({ '%url%': path('homepage') })|raw }}
+    </p>
+{% endblock %}
+
+{% block sidebar %}
+    {{ parent() }}
+{% endblock %}