Undo history pollution

I can see that there have been no updates for quite some time, so I'm just testing the waters really.

Sorting all of the functions in a file seems to generate a whole lot of undo steps from each step in the sorting process. If you feel so inclined, you could use [Meriyah](https://github.com/meriyah/meriyah) to parse the JavaScript (ensuring that options to preserve whitespace and token/character positions is enabled). You could then sort the top-level AST tokens easily, then use the character positions stored against each of those tokens to slice up the original source code into strings that you then re-concatenate in the desired order, and finally write back to the editor as updated source code in a single undoable step.