ui: better ogp meta on problem_detail page

packages/ui-default/templates/layout/basic.html

@@ -23,3 +23,5 @@
 </div>
 {% if UserContext and not handler.user._id %}{% include "partials/login_dialog.html" %}{% endif %}
 {% endblock %}
+{% block ogp %}
+{% endblock %}

packages/ui-default/templates/layout/html5.html

@@ -19,12 +19,14 @@
   <link rel="icon" type="image/png" href="{{ UiContext.cdn_prefix }}favicon-16x16.png" sizes="16x16">
   {% if handler.context.request.url %}<link rel="canonical" href="{{ model.system.get('server.url') }}{{ handler.context.request.url.substring(1) }}">{% endif %}
   <meta name="theme-color" content="#56758f">
-  {% block ogp %}
+  {% block ogp_site %}
   <meta property="og:site_name" content="{{ (handler.domain|default({ui:[]})).ui.name|default(model.system.get('server.name')) }}" />
-  <meta property="og:title" content="{{ handler.renderTitle(page_name) }}" />
   <meta property="og:url" content="{{ model.system.get('server.url') }}{{ handler.request.path.slice(1) }}" />
   <meta property="og:image" content="{{ UiContext.cdn_prefix }}favicon-96x96.png" />
   {% endblock %}
+  {% block ogp %}
+  <meta property="og:title" content="{{ handler.renderTitle(page_name) }}" />
+  {% endblock %}
   <title>{{ handler.renderTitle(page_name) }}</title>
   <style>
     body {