[gnome-photos] (10 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:

  d961062... item-manager: Add photos_item_manager_(un)hide_item
  1cef8e8... item-manager: Assert that new items don't have hidden URNs
  a413a14... item-manager: Remove hidden items that have been deleted ou
  004ebbb... Use photos_item_manager_(un)hide_item to handle deletes
  11fa838... preview-nav-buttons: Remove redundant header
  ae48118... base-manager: Make get_object_by_id a virtual method
  9799deb... base-manager: Make get_active_object a virtual method
  9dd734a... base-manager: Add photos_base_manager_new
  cdc85bf... item-manager: Add an array of child BaseManagers for each W
  3d53bd5... WIP