Proposed changes to pattern order editing

[WangledTeb]

The way the pattern order editing is set up now, it's a little confusing and inconvenient to delete a specific instance of a pattern from the order; pressing the delete button actually erases the currently-selected pattern from the song entirely, including every instance of it in the order. To delete a specific instance, you need to press "add" first to add a new pattern, then set any instance that you wish to remove from the order to the new pattern, then delete that pattern. It's also easy to accidentally delete a pattern entirely, and there is no undo function for deleting a pattern.

I propose either:

1. Change the delete button to delete only the currently selected instance of a pattern, and move the "delete pattern entirely" function to the edit menu; or
2. Make the undo function able to undo deleting/adding new patterns to the song, as well as adding instances of patterns to the order

Or both.