Function key
Control + arrow keys
Shift + arrow keys
Insert key

Not tested on windows

Some blocks are not correctly aligned/shifted (see keymap.rs).

KillRing is bound to the LineBuffer only during Kill operations.
And the ChangeSet is unbound to the LineBuffer when undoing.

The implementation is still incomplete...

Note: a Map is used instead of a Vec because I could not make
the unbound method works with a Vec.

But undo panic: already borrowed: BorrowMutError