Tabs on both sides in compact mode

[jlnalber]

I absolutely love the compact mode in zen browser. It so much cleaner this way. However, I would suggest a minor enhancement.
You can already select whether the tab bar should appear on the left or on the right. In compact mode however, it would be really cool to have an option to show tabs on both sides of the window, because both sides are never collapsed at the same time. It's only a minor enhancement but could be really convenient.