Pin Menu Open In 9.0?

I really like the new look overall for 9.0, but is there any way to make the left menu stay open like you could in 8.x? I imagine most of us do the majority of our development on large screens (1920 wide is pretty standard for your average monitor these days). In 8.x I could pin the left sidebar open all the time so that navigation between sections was very fast. In 9.0, the menu has moved to a popup menu on the top left corner and there’s tons of wasted space on my left sidebar.

I know I can change the overall layout to use a fluid/responsive look and get rid of the empty whitespace on the left and right, but I’d rather have the menu be open on the left all the time. Is this possible somehow? Or can we get some preference for this added back?