Codex

- Features
- Admin Stats tab
- Libraries can have a poll delay longer than 1 day.
- Fixes
- Crash when removing comics.
- Admin Create & Update dialogs would get stuck open on submit.
- Delete expired and corrupt sessions every night.
- More liberal touch detection for more devices.

- Fixes
- Multiprocessing speedup for large search engine indexing jobs
- Writes search engine data in segments.
- Search engine segment combiner optimizer runs nightly (and manually).

- Fixes
- Fix some OPDS browsers unable to read comics.

- Fixes
- Fix unable to initialize database on first run

Whoosh

- Features
- Switch to Whoosh Search Engine.
- You may delete `config/xapian_index`.
- May run on Windows now?
- Moved db backups to `config/backups`.
- Backup database before migrations.
- Removed
- Do not store search history for combobox across sessions.
- Fixes
- Fix Admin Library folder picker.
- Uatu does a better job of ignoring device changes.
- Don't pop out of folder mode on searches.
- Fix showing error on unable to load comic image.

- Features
- Force update all failed imports admin task.
- Fixes
- Fix moving folders to subfolder orphans folders bug.
- Fix id does not exist redirect loop.