Fetch all metadata and fix metadata view

Summary:
Not all metadata was fetched from the database.
Also do not load database id for display in the
metadata view.

Test Plan:
Year is displayed in metadata view
No empty entry with bogus label

Reviewers: mgallien, ngraham

Reviewed By: ngraham

Tags: Elisa

Differential Revision: https://phabricator.kde.org/D23934