Quick update to tweak a few things.

• Extra-time tweaking

Back to how it was a bunch of versions ago: 15 sec for cargo / radar, 10 sec for valkyries, 5 sec for falcons. In endless the values drop after each wave to a minimum of 20%.

• No more crashing with enemy jets

I guess a few of you will like this one.

• Added 'Target Lock' option

Set how fast it takes to change target.