[Freeciv] Map coordinates

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Hello, list

I have an idea to make map coordinates menu, so it will be more
easy to send units to some place on map.
Also, it may be good to make this menu alialiable after
exploring some advance (like Navigation).

And mys second question -
Why Go-To mechanizm is so boring? On the ground it can be used sometimes,
but on the sea it cant. I mean when i select some unit,
hit "G" and pick some place on map. On the sea the way to selected destination
is very long and not optimal.

thanx.

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