on_exit() is being called when switching from a superstate to one substate

[TSMotter]

• Currently, on_exit() is called when switching from a superstate to one substate.

• Example:

  • When going from Heating to Toasting, Heating on_exit() is executed even though Toasting is within Heating. This promotes some non wanted behavior like: Going from Heating to Toasting would turn off the heater because of Heating.on_exit()