Maps: "Navigate to" action to trace a route between two points, nav. events and custom themes

This are actually various feature requests for maps that can improve it’s use in many cases but I grouped in

  1. A system generated action that automatically open the map, trace a route and start navigation.
  2. “On arrival” “Cancelled” events that trigger an action we can select
  3. Customizable theme maps:
    3.1 Being able to disable labels and change the map color.

Some examples:
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What do you think? is it doable?