Editor history is no longer required to update widgets.

Not sure if this is the right way to fix this, but the editor history no longer has the changes object.

And if you use CTRL+click to select multiple lines and then paste, the change event is triggered for each of those cursors. This fixes the error reported on issue #1 
As a side note: the editor works fine when using typing text with multiple cursors but it acts weirdly when pasting, probably a bug should be raised against LT.