Rated 5 out of 5 stars

Excellent addon, thanks!
By the way, could you add an option to display the message in a new tab when clicking or double-clicking on the message header? Currently you have to double-click on the message in the list.
Thanks again

This review is for a previous version of the add-on (1.1.3). 

Open in tab by double click

The idea with the double click on the header pane sounds interesting. But I think, this can be done in a separate add-on. At the moment I am not planing to extend the functionality of this add-on.