Rated 5 out of 5 stars

Is is possible to hide this bar?
Thank you.

This review is for a previous version of the add-on (1.5.4). 

Add this code to a Stylish style to remove that separator:

#PanelUI-button {
background:none !important;
margin-inline-start: 0px !important;
border-inline-start: 0px solid !important;
border-image: unset !important;
border-image-slice: 0 !important;

I will add it to CTBs "classic style for old large/small buttons" options on next update.