Maybe only a workround this, but I think it will do what you want. Go to Cinnamon Settings>Panel. Check the boxes for "Use customised panel size" and "Allow Cinnamon to scale panel text .........." then change the panel height to zero. Click the "Panel edit mode" box to see the effect (switch off the edit mode before leaving the dialog box).
Fujitsu Lifebook AH532 Laptop. Intel i5 processor, 6Gb ram, Intel HD3000 graphics, Intel Audio/wifi. Realtek RTL8111/8168B Ethernet.Ubuntu12.10 (Unity), Mint14 (Cinnamon), Manjaro (Xfce).