Closes#6822
Updates #5142
Release Notes:
- Added new fold actions to toggle folds (`cmd-k cmd-l`), fold every
fold (`cmd-k cmd-0`) unfold every fold (`cmd-k cmd-j`) to fold
recursively (`cmd-k cmd-[`) and unfold recursively (`cmd-k cmd-]`).
- vim: Added `za` to toggle fold under cursor.
- vim: Added `zO`/`zC`/`zA` to open, close and toggle folds recursively
(and fixed `zc` to not recurse into selections).
- vim: Added `zR`/`zM` to open/close all folds in the buffer.
Conrad Irwin
1be3c44550