Fixed error on repository when there are no comments in a changeset (#4126).
Add etag check on the activity view to avoid rendering when not modified.
Add indexes on various timestamps to speed up the activity view.
IssuesController#destroy accepts POST only (#4107).
HTML escaping (#4106).
Add translations for new permission.
Add a permission to remove issue watchers (#2450).
Allow project forums copy.
Display stats about objects that can be copied.
Do not ignore parent project setting on project copy (#3386).
