Add a confirmation on flee attempts

[TerryCavanagh]

This catches a couple of people out, but the worst thing about it is that it punishes people for experimenting by clicking on random things, which is really bad. A simple confirmation on this would be a good addition.

[DiceWithDeath]

Yes, could there be something to confirm what's going to happen as well (the fact it's only a chance, and that you get attacked)? Something like 'Are you sure you want to try to flee? Your enemy will still have a chance to attack on your way out!'

[TerryCavanagh]

Fixed.