Escort portals are now shown on quest start

Currently you have to spam ask escorts and extrapolate their pathing from that.  This is reliable but tedious, may as well just show where they're going.

game/modules/tome/data/quests/escort-duty.lua

@@ -418,6 +418,7 @@ on_grant = function(self, who)
 
 	g:resolve() g:resolve(nil, true)
 	game.zone:addEntity(game.level, g, "terrain", gx, gy)
+	game.state:locationRevealAround(gx, gy)
 	npc.escort_target = {x=gx, y=gy}
 	npc.x, npc.y = nil, nil
 	game.zone:addEntity(game.level, npc, "actor", x, y)