/usr/share/shotwell/ui/ is in shotwell-common 0.22.0+git20160108.r1.f2fb1f7-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/shotwell/ui/collection.ui
/usr/share/shotwell/ui/direct.ui
/usr/share/shotwell/ui/direct_context.ui
/usr/share/shotwell/ui/event.ui
/usr/share/shotwell/ui/events_directory.ui
/usr/share/shotwell/ui/fullscreen.ui
/usr/share/shotwell/ui/import.ui
/usr/share/shotwell/ui/import_queue.ui
/usr/share/shotwell/ui/media.ui
/usr/share/shotwell/ui/offline.ui
/usr/share/shotwell/ui/photo.ui
/usr/share/shotwell/ui/photo_context.ui
/usr/share/shotwell/ui/savedsearch.ui
/usr/share/shotwell/ui/search_bar.ui
/usr/share/shotwell/ui/search_sidebar_context.ui
/usr/share/shotwell/ui/set_background_dialog.glade
/usr/share/shotwell/ui/set_background_slideshow_dialog.glade
/usr/share/shotwell/ui/shotwell.glade
/usr/share/shotwell/ui/shotwell.xml
/usr/share/shotwell/ui/sidebar_default_context.ui
/usr/share/shotwell/ui/tag_sidebar_context.ui
/usr/share/shotwell/ui/tags.ui
/usr/share/shotwell/ui/top.ui
/usr/share/shotwell/ui/trash.ui