Mac: Fix setting Control.ToolTip to null. Fixes #317
Mac: Fix setting Control.ToolTip to null. Fixes #317

l8s/Eto,bbqchickenrobot/Eto-1,PowerOfCode/Eto,bbqchickenrobot/Eto-1,PowerOfCode/Eto,bbqchickenrobot/Eto-1,l8s/Eto,PowerOfCode/Eto,l8s/Eto