Add shortcuts for cut, copy, paste and split cells (#12338)
Add shortcuts for cut, copy, paste and split cells (#12338)

For #10496

Jupyter keyboard shorcuts for cut, copy, paste & split cells
DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode,DonJayamanne/pythonVSCode