Tower: use bonus system for lookout tower and grail extra sight radius

Skyship code in GH::newTurn can be also dropped since darkness will never cover tiles team have sight over.

lib/IGameCallback.cpp

@@ -59,7 +59,7 @@ void CPrivilagedInfoCallback::getTilesInRange(std::unordered_set<int3, ShashInt3
 		logGlobal->error("Illegal call to getTilesInRange!");
 		return;
 	}
-	if (radious == -1) //reveal entire map
+	if (radious > 5000) //reveal entire map
 		getAllTiles (tiles, player, -1, 0);
 	else
 	{

lib/mapObjects/CGTownInstance.cpp

@@ -434,14 +434,7 @@ void CGDwelling::serializeJsonOptions(JsonSerializeFormat & handler)
 
 int CGTownInstance::getSightRadius() const //returns sight distance
 {
-	if (subID == ETownType::TOWER)
-	{
-		if (hasBuilt(BuildingID::GRAIL)) //skyship
-			return -1; //entire map
-		if (hasBuilt(BuildingID::LOOKOUT_TOWER)) //lookout tower
-			return 20;
-	}
-	return 5;
+	return 5 + valOfBonuses(Bonus::SIGHT_RADIOUS);
 }
 
 void CGTownInstance::setPropertyDer(ui8 what, ui32 val)
@@ -1089,6 +1082,8 @@ void CGTownInstance::recreateBuildingsBonuses()
 	}
 	else if(subID == ETownType::TOWER) //tower
 	{
+		addBonusIfBuilt(BuildingID::LOOKOUT_TOWER, Bonus::SIGHT_RADIOUS, +20);
+		addBonusIfBuilt(BuildingID::GRAIL, Bonus::SIGHT_RADIOUS, +5001); //more than 5000 reveal entire map
 		addBonusIfBuilt(BuildingID::GRAIL, Bonus::PRIMARY_SKILL, +15, PrimarySkill::KNOWLEDGE); //grail
 	}
 	else if(subID == ETownType::INFERNO) //Inferno

server/CGameHandler.cpp

@@ -1698,26 +1698,6 @@ void CGameHandler::newTurn()
 		{
 			n.res[player] = n.res[player] + t->dailyIncome();
 		}
-		if (t->hasBuilt(BuildingID::GRAIL, ETownType::TOWER))
-		{
-			// Skyship, probably easier to handle same as Veil of darkness
-			//do it every new day after veils apply
-			if (player != PlayerColor::NEUTRAL) //do not reveal fow for neutral player
-			{
-				FoWChange fw;
-				fw.mode = FoWChange::REVEALED;
-				fw.player = player;
-				// find all hidden tiles
-				const auto & fow = getPlayerTeam(player)->fogOfWarMap;
-				for (size_t i=0; i<fow.size(); i++)
-					for (size_t j=0; j<fow.at(i).size(); j++)
-						for (size_t k=0; k<fow.at(i).at(j).size(); k++)
-							if (!fow.at(i).at(j).at(k))
-								fw.tiles.insert(int3(i,j,k));
-
-				sendAndApply (&fw);
-			}
-		}
 		if (t->hasBonusOfType (Bonus::DARKNESS))
 		{
 			for (auto & player : gs->players)