Fix the watched group/institution page errors (Bug #1099811)

Get the correct owner info of a watched view in cases of group or
institution pages

Change-Id: I144f969a1cbe464892cc20a33fa6336928373278
Signed-off-by: Son Nguyen <son.nguyen@catalyst.net.nz>

htdocs/lang/en.utf8/activity.php

@@ -68,7 +68,7 @@ $string['stopmonitoringsuccess'] = 'Stopped monitoring successfully';
 $string['stopmonitoringfailed'] = 'Failed to stop monitoring';
 
 $string['newwatchlistmessage'] = 'New activity on your watchlist';
-$string['newwatchlistmessageview'] = '%s has changed their page "%s"';
+$string['newwatchlistmessageview1'] = 'The page "%s" belonging to %s has been changed';
 
 $string['newviewsubject'] = 'New page created';
 $string['newviewmessage'] = '%s has created a new page "%s"';

htdocs/lib/activity.php

@@ -831,7 +831,7 @@ class ActivityTypeWatchlist extends ActivityType {
 
         require_once('view.php');
         if ($this->viewinfo = new View($this->view)) {
-            $this->ownerinfo = $this->viewinfo->get_owner_object();
+            $this->ownerinfo = hsc($this->viewinfo->formatted_owner());
         }
         if (empty($this->ownerinfo)) {
             if (!empty($this->cron)) { // probably deleted already
@@ -888,8 +888,8 @@ class ActivityTypeWatchlist extends ActivityType {
     }
 
     public function get_message($user) {
-        return get_string_from_language($user->lang, 'newwatchlistmessageview', 'activity', 
-                                        display_name($this->ownerinfo, $user), $this->viewinfo->get('title'));
+        return get_string_from_language($user->lang, 'newwatchlistmessageview1', 'activity',
+                                        $this->viewinfo->get('title'), $this->ownerinfo);
     }
 
     public function get_required_parameters() {