Implemented Split Cell for multicursor #4824
Merged
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I took the current split cell functionality and made it work for multicursor. The help message for split cell is also updated to imply multicursor splitting is possible.
This can be done by putting the cursor at multiple locations (Alt+Drag/Ctrl+Click) and pressing Ctrl+Shift+Minus. The result should be new cells split at each of the cursors.
Additionally, this PR now makes cell splitting handles selections, so if you select a piece of code/text, then hit Ctrl+Shift+Minus, it'll put the selected text in a new cell with the text before/after the text going into their own cells. It is able to handle a combination of cursors and selections.
I retained the functionality of removing newlines at the beginning and end of the created cells, so the original single cursor behavior remains the same.