plugin projects-hierarchy: support listing of child trackers, forums & packages in respective index page.
- [DH] src/plugins/projects-hierarchy/actions/updateGlobalConf.php
- [DH] src/plugins/projects-hierarchy/actions/updateProjectConf.php
- [DH] src/plugins/projects-hierarchy/common/projects-hierarchyPlugin.class.php
- [DH] src/plugins/projects-hierarchy/db/20161229-plugin-hierarchy-frs-forum-tracker.sql
- [DH] src/plugins/projects-hierarchy/view/admin/viewGlobalConfiguration.php
- [DH] src/plugins/projects-hierarchy/view/admin/viewProjectConfiguration.php