Merge pull request #129 from rthbound/use_thead_for_th2

Puts th inside thead, puts tr in tbody (plugins#updated)

app/views/plugins/updated.html.haml

@@ -5,12 +5,14 @@
 - else
   = form_tag(bulk_upgrade_plugins_path, method: :patch) do
     %table{class: "table table-striped table-hover"}
+      %thead
         %tr
           %th.col-xs-2= t('plugins.common.name')
           %th.col-xs-2= t('plugins.common.authors')
           %th.col-xs-6= t('plugins.common.summary')
           %th.col-xs-1= t('plugins.common.installed_version')
           %th.col-xs-1= t('plugins.common.latest_version')
+      %tbody
         - @plugins.each do |plugin|
           %tr
             %td