Add hotkey for switching traditional movement on/off

[Matti-patti]

Sometimes, for instance when you are checking through villages building or navigating through lots of thick forest you might want to switch to traditional movement to save on keystrokes. It would be handy if we could toggle it with hotkey rather than going to the menu for it.

[JP_Finn]

Not a bad suggestion, holding down Alt key does that, but not as a toggle.

… I use it mostly traversing spruce mires.