this is very impressive. the only one bit that is in my muscle memory from using Jupyter is 'A' (add above), 'B' (add below) and 'D-D' (delete) shortcuts. kud

this is very impressive. the only one bit that is in my muscle memory from using Jupyter is 'A' (add above), 'B' (add below) and 'D-D' (delete) shortcuts. kudos for adding polars support!