[1.06] Melee attackers never run to diagonal tiles

[NeoTiger]

Not really a bug but perhaps an inconvenience which unnecessarily enforces micromanagement: If a soldier with a shock baton gets an order to run up to an alien and hit it, the path to the target is always calculated to end up on one of the four horizontally or vertically adjacent tiles, disregarding any diagonally adjacent tiles from which melee attacks can also be performed and which would save the soldier 4 TUs.