Make narrow.by_subject 'read' its message.

(imported from commit e81140c440fecd283443eab46f0c65faffee8df1)

tools/jslint/check-all.js

@@ -49,6 +49,7 @@ var globals =
     + ' fast_forward_pointer recent_subjects unread_subjects'
     + ' add_message_metadata'
     + ' respond_to_cursor respond_to_sent_message'
+    + ' mark_message_as_read'
     ;
 
 

zephyr/static/js/narrow.js

@@ -488,6 +488,7 @@ exports.by_subject = function (target_id, opts) {
         exports.by_recipient(target_id, opts);
         return;
     }
+    mark_message_as_read(original);
     opts = $.extend({}, {then_select_id: target_id}, opts);
     exports.activate([
             ['stream',  original.stream],