Create a new ListGroupData fragment that excludes expensive recursive
count fields (scene_count_all, sub_group_count_all, etc. with depth: -1).
These fields cause 10+ second queries on large databases when loading
the groups list page.
The full GroupData fragment is preserved for detail views where the
recursive counts are needed.
* Make ffmpeg/ffprobe settable and remove auto download
* Detect when ffmpeg not present in setup
* Add download ffmpeg task
* Add download ffmpeg button in system settings
* Download ffmpeg during setup
* Add ids to findMovies input
* Use ids for other find interfaces
* Update client side
* Fix gallery select function
* Replace movie select
* Re-add creatable
* Overhaul movie table
* Remove and deprecated unused code
