admin-user-list: expose last activity in exchange to last login.

- last login is less important than activity
- last login can always be shown in advnaced view
- make the `authnetiaction type` label to be shorter

rhodecode/templates/admin/users/users.html

@@ -94,15 +94,15 b''
                   "sort": "first_name"}, title: "${_('First Name')}", className: "td-user" },
          { data: {"_": "last_name",
                   "sort": "last_name"}, title: "${_('Last Name')}", className: "td-user" },
-         { data: {"_": "last_login",
-                  "sort": "last_login_raw",
-                  "type": Number}, title: "${_('Last login')}", className: "td-time" },
+         { data: {"_": "last_activity",
+                  "sort": "last_activity_raw",
+                  "type": Number}, title: "${_('Last activity')}", className: "td-time" },
          { data: {"_": "active",
                   "sort": "active_raw"}, title: "${_('Active')}", className: "td-active" },
          { data: {"_": "admin",
                   "sort": "admin_raw"}, title: "${_('Admin')}", className: "td-admin" },
          { data: {"_": "extern_type",
-                  "sort": "extern_type"}, title: "${_('Authentication type')}", className: "td-type"  },
+                  "sort": "extern_type"}, title: "${_('Auth type')}", className: "td-type"  },
          { data: {"_": "action",
                   "sort": "action"}, title: "${_('Action')}", className: "td-action" }
       ],