The hard limit from sqlite may be larger, but things slow down as more
tags are selected.
https://forums.ankiweb.net/t/unable-to-create-custom-test/10467
There are a number of things that could be improved here:
- we should show a live count so users are aware of the limit
- we should be filling in the parent tags when they're not explicitly
listed on a card
- we should reconsider disabling the 'tags to include' by default
It may make sense to defer these changes until we can move this screen
into Svelte/handle the processing in the backend.
