The tools are opened on the bottom of the chrome window per default. This is a rather bad choice for a wide screen display since there is plenty of empty space to the right
After I have placed my dock to the right (see older answers), I still found the panels split vertically.
To split the panels horizontally - and even got more from your screen width - go to Settings (bottom right corner), and remove the check on 'Split panels vertically when docked to right'.
Now, you have all panels from left to right :p
Looks like this is on the bottom left now as an icon with overlapping windows and the "Undock into separate window." tooltip.