embed: Change [Albums|Photos|Favorites] to [Recent|Albums|Favorites]

This is as per the latest designs at
https://wiki.gnome.org/Design/Apps/Photos
dlna-renderer: Style fixes
tracker-queue: Make it fallible

PhotosTrackerQueue will not work if we fail to get a
TrackerSparqlConnection. This can happen if tracker-store is not
running.

Fixes: https://bugzilla.gnome.org/704947
camera-cache: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
utils: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
collection-icon-watcher: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
create-collection-job: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
delete-item-job: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
fetch-collections-job: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
offset-controller: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
set-collection-job: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
single-item-job: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
update-mtime-job: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
tracker-change-monitor: Make it fallible

PhotosTrackerChangeMonitor will not work if we fail to get a
TrackerSparqlConnection or TrackerResources. This can hapen if
tracker-store is not running.

Fixes: https://bugzilla.gnome.org/704947
tracker-controller: Be robust against PhotosTrackerQueue failures

Fixes: https://bugzilla.gnome.org/704947
fetch-collection-state-job: Remove unused object