Make Oscar theme scalable

searx/templates/oscar/base.html

@@ -8,7 +8,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="generator" content="searx/{{ searx_version }}">
     <meta name="referrer" content="no-referrer">
-    <meta name="viewport" content="width=device-width, initial-scale=1 , maximum-scale=1.0, user-scalable=1" />
+    <meta name="viewport" content="width=device-width, initial-scale=1 , maximum-scale=2.0, user-scalable=1" />
     {% block meta %}{% endblock %}
     <script src="{{ url_for('js_translations') }}"></script>
     <title>{% block title %}{% endblock %}{{ instance_name }}</title>