Option to set system clipboard (+ register) as the default/unnamed register

[banderlog]

Yanking text within cell puts it in some non system buffer (xclip does not see it). It is very inconvinient

[ianhi]

If you install jupyterlab-vimrc (https://github.com/ianhi/jupyterlab-vimrc#jupyterlab-vimrc) and go to that extensions settings and setting unnamedplus to true then yy will yank to the system clipboard

[joelostblom]

I think it would be great if it was possible to include this part of jupyterlab-vimrc into jupyterlab-vim as part of the core extension

[joelostblom]

Actually, this could probably be close as a duplicate of #36. See #36 (comment)

[joelostblom]

Thanks for the clarification in #36 @firai. Could the title of this issue be updated to reflect that it is about changing the default clipboard register?

[firai]

Since system clipboard access is now handled upstream in codemirror-vim and since this option exists in vim, this issue might be more appropriate upstream as well

[banderlog]

jupyterlab-vimrc is outdataed like hell: jupyterlab-vimrc 0.5.2 requires jupyterlab==3.*,>=3.0.0rc2,