Commit 065118cf deleted Migrations.migrate_to_v11_5_0, which despite its
name ran on every startup and was the only code that read
QuickFilters.json into QuickFilters.InMemoryState. Since v13.7.6, saved
quick filters were never loaded after a restart, and adding a new filter
overwrote the file.
Make QuickFilters load its state lazily from disk on first access so it
no longer depends on a startup hook. Restore the pre-v11.5.0 format
fallback (plain string filters without names) that the deleted migration
provided, and add regression tests covering load formats and
restart persistence.
Co-authored-by: rmcrackan <rmcrackan@gmail.com>
