Feature Request: (1) lists of lists + (2) fine-grained control over context cues

[Maitreya20201103]

Checklist

Please replace the space inside the brackets with an x if the following items apply:

• I've verified that I use the latest version of the add-on by redownloading it from AnkiWeb
• I've verified that I use the latest version of Anki by checking at https://apps.ankiweb.net#download
• I've checked if anyone else suggested this feature before by looking through the issue reports.

Problem case

Is your feature request related to a problem? If so, please describe it here. E.g.: "My workflow is such and such, and this and that would help."

Example:

A

• A1
• A2
• B3
  B
• B1
• B2
  C
• C1
• C2
• C3

I would like to have the ability
to use A as the context cue for both B and A1
to use B as the context cue for both C and B1
to use C as the context cue for both A and C1

I'm not sure how to implement this.
A quick hack approach might be to allow for double wrapping of individual list items.
My intuition is that would not be a good long term approach however.
My intuition is that a good long term approach would be "list integration via drill-down lists".
i.e. Allow the user to
1: Create separate lists
2: Integrate them into higher level lists
As this is kind of how the brain constructs maps of the world, this would have a wide range of applications.

Verse 1
Verse 2
Chorus
Verse 3
Verse 4
Chorus (same sublist integrated in 2 different locations)

Solution

Concisely describe the solution you would like

Concisely describe alternatives you've considered (if any)

More information

Additional context: Add any other context or screenshots about the feature request here.