[gnome-photos] (11 commits) Created branch wip/rishi/item-manager

[Debarshi Ray <debarshir src gnome org>]

The branch 'wip/rishi/item-manager' was created.

Summary of new commits:

  c693983... base-manager: Be more strict about what is acceptable
  3ae93a6... item-manager: Add photos_item_manager_(un)hide_item
  eb0a618... item-manager: Assert that new items don't have hidden URNs
  c218433... item-manager: Remove hidden items that have been deleted ou
  eca1492... Use photos_item_manager_(un)hide_item to handle deletes
  8bacee4... preview-nav-buttons: Remove redundant header
  a2db4d0... base-manager: Make get_object_by_id a virtual method
  57725f7... base-manager: Make get_active_object a virtual method
  d7d642e... base-manager: Add photos_base_manager_new
  e6b0230... item-manager: Add an array of child BaseManagers for each W
  963a55f... WIP