Add setting to increase station catchment radius.

Update acceptance and refresh screen when catchment settings change.

src/settings.cpp

@@ -1317,6 +1317,9 @@ static bool ChangeMaxHeightLevel(int32 p1)
 static bool StationCatchmentChanged(int32 p1)
 {
 	Station::RecomputeIndustriesNearForAll();
+	Station *st;
+	FOR_ALL_STATIONS(st) UpdateStationAcceptance(st, true);
+	MarkWholeScreenDirty();
 	return true;
 }