Deletion of a resource is slow

It often takes a while to delete a resource (several seconds).

In case gallery view was scrolled immediately after deletion, crash can occur.

Start by reproducing the delay when deleting a resource, then scroll the gallery view immediately after deletion to check the reported crash. Trace the resource-deletion and gallery-view entry points, and use the reproduction to identify the relevant behavior. Done means deletion completes promptly and immediate gallery scrolling no longer crashes.

Written by the indexing model from the issue text.