Suggestion: Ability to lock thead and columns

[itssimple]

If you have a big datasheet that you want to edit, you may want to keep an ID-column to your left that's always visible.

And for the same reason, if you're further down the sheet, you may want to see the column names aswell.

Example on pinned column schema:
{ "name": "id", "type": "int", "pinned": true }

[lambdaq]

freeze columns/rows would be very helpful.