`remove-if-not` should have `cl-` prefix

[l3kn]

`remove-if-not` should have `cl-` prefix

[l3kn]

Fixed with the current commit.
Usually I have a script that checks for things like this but that's broken at the moment,
I hope I didn't miss any other cl- prefixes.

Customizable keyboard shortcuts for the review would be nice,
with the current implementation you'd need to redefine the two hydras.
(org-fc-review-flip-hydra and org-fc-review-rate-hydra)

Ideally, there would be minor modes for flipping / rating card
(like https://github.com/abo-abo/pamparam).
I have not found a good way to make this work with evil-mode yet.

https://gitlab.com/phillord/org-drill uses read-key during review,
with a bunch of defvars for each key.

I'll see if I can get one of the approaches to work

[l3kn]

Hi @Tubo,

I've pushed a branch with new implementation of the review loop using two minor modes,
this way keyboard shortcuts can be customized using define-key.

I still need to write some documentation for it and make sure the modes are reset correcty in all scenarios, but I've been using this for a few days without any problems.

If you'd like to help with testing, you can check out the mode-based-review branch
(https://github.com/l3kn/org-fc/tree/mode-based-review).

[l3kn]

Mode based review has been merged.