Fix/skip suspended cards in graphs context retrievability

[L-M-Sherlock]

close #3517

[user1823]

There still exists a minor discrepancy.

It is likely because the add-on counts all siblings, including the suspended ones. If you want, I can submit a PR in the add-on repo to correct this.

Edit:

• Fix/Exclude suspended siblings in retention by notes open-spaced-repetition/fsrs4anki-helper#478

[brishtibheja]

It's not a good idea to do that here but not elsewhere in stats. Also, if you trust in the DSR values, you know some material of the suspended cards. That not being in total knowledge is weird.

I actually keep most of my cards (suspended) even after I've learned them to a very good level (for duplicate checking). Works for yomitan etc. If some users would want to look at total knowledge or other graphs with is:suspended cards excluded perhaps can add an option for them? Similar to what we have in "Card Counts".

[dae]

First things first, let's make it consistent with the add-on. If you're proposing further changes to both, that's perhaps better discussed separately.