Based on the great work from theprojectsomething: https://gist.github.com/theprojectsomething/6813b2c27611be03e67c78d936b0f760
Select "Horizontal Tab Bar" and "Collapse Tree Style Tab" in the "Tab Bar Style" Select "Optimize browser for Vertical Tab Bar" to hide the Horizontal tab bar
Under the advanced tab in the Tree Style Tab options past in the below theme.css