Fix 'Target Next'/'Target Closest'

The 'Target Closest' function targets closest enemy, but if pressed several times does not cycle through enemies.

My suggestion 'Target Closest' function is changed to cycle through enemies from closest to most distant, exactly like 'Target Next' does now.

I think the reason there are two targeting methods is that things move. Consider this, how would you target something which is SECOND closest to you at the time you initially hit 'target closest,' but moved to FIRST closest to you. And then, how would you target the THIRD closest to you when FIRST closest to you and SECOND closest to you are always alternating their positions? Targeting either of these is easily manageable with the current system.

I went into customise and selected a hot key to do this and I used Y as it as it is close to T and I use it in another game to target so I push T then Y ans spacebar.