Excellent theme! Rated 5 out of 5 stars

Great theme. I'd previously been unable to find a "Reply All" button, but I now know to right click on mail toolbar and customize, or restore defaults, and there it is. This is a fantastic theme. (Thanks Dev)

This review is for a previous version of the add-on (3.1.9.02). 

Thanks for the update on your review, I appreciate it.
I did not find it at first either - I had clicked the preview header's toolbar.
This has given me an idea