Initial implementation of the split editbox
Add a unique ID to dialogue lines

This is needed to track lines across undo, as the previous method of
using the row number was slow and broke on inserts/deletes.
Don't update the initial line state after undo
Add a button to the split editbox to remove the line text only, leaving override tags
Make the split editor readonly rather than disabled
Add padding between the split editbox buttons
no blacklist
Add tarball files