Implv/125 Selective batch deletion in search result page

* Fix a problem current username uncought.
  (Move data-current-username from #content-main id to body tag. )

lib/views/layout/layout.html

@@ -71,6 +71,7 @@
   data-plugin-enabled="{{ isEnabledPlugins() }}"
  {% block html_base_attr %}{% endblock %}
   data-csrftoken="{{ csrf() }}"
+  data-current-username="{% if user %}{{ user.username }}{% endif %}"
  >
 
 {% block layout_head_nav %}

lib/views/not_found.html

@@ -38,7 +38,6 @@
   data-path-shortname="{{ path|path2name }}"
   data-page-id="{% if page %}{{ page._id.toString() }}{% endif %}"
   data-current-user="{% if user %}{{ user._id.toString() }}{% endif %}"
-  data-current-username="{% if user %}{{ user.username }}{% endif %}"
   data-page-revision-id="{% if revision %}{{ revision._id.toString() }}{% endif %}"
   data-page-revision-created="{% if revision %}{{ revision.createdAt|datetz('U') }}{% endif %}"
   data-page-is-seen="{% if page and page.isSeenUser(user) %}1{% else %}0{% endif %}"

lib/views/page.html

@@ -54,7 +54,6 @@
   data-path-shortname="{{ path|path2name }}"
   data-page-id="{% if page %}{{ page._id.toString() }}{% endif %}"
   data-current-user="{% if user %}{{ user._id.toString() }}{% endif %}"
-  data-current-username="{% if user %}{{ user.username }}{% endif %}"
   data-page-revision-id="{% if revision %}{{ revision._id.toString() }}{% endif %}"
   data-page-revision-created="{% if revision %}{{ revision.createdAt|datetz('U') }}{% endif %}"
   data-page-is-seen="{% if page and page.isSeenUser(user) %}1{% else %}0{% endif %}"

lib/views/page_list.html

@@ -77,7 +77,6 @@
   data-page-portal="{% if page and page.isPortal() %}1{% else %}0{% endif %}"
   data-page-id="{% if page %}{{ page._id.toString() }}{% endif %}"
   data-current-user="{% if user %}{{ user._id.toString() }}{% endif %}"
-  data-current-username="{% if user %}{{ user.username }}{% endif %}"
   data-page-revision-id="{% if revision %}{{ revision._id.toString() }}{% endif %}"
   data-page-revision-created="{% if revision %}{{ revision.createdAt|datetz('U') }}{% endif %}"
   data-page-is-seen="{% if page and page.isSeenUser(user) %}1{% else %}0{% endif %}"