Sorry for the inconvenience.
I have suggestions for you...
You can use the context menu to edit those addons. Context menu appears when you right-click inside of an addon, it gives you useful edit options right there.
Another suggestion is that you can create a new Row, put a divider addon there, then disable that row, and move that disabled row on top of all.
And keep it please, must be disabled, not deleted. Then you may be able to edit all rows below.
Please follow the screencast: https://imgur.com/a/y113xaM
Thanks