Key binding requests

[Keiranhalcyon31]

Some of these are from XWA. Others are new.

• cycle friendly/neutral/enemy craft (XWA F1/F2/F3/F4)
• cycle mission-critical craft (ie, craft which must complete mission. For the purpose of following up with targeting attackers of said craft.)
• transfer as much energy as possible between shields/lasers (XWA :/")
• elst presets (XWA F11/F12)
• Rebalance laser/ion energy (so annoying)

Future-looking:

• Allow F8 to function as targeting memory slot when flying craft not equipped with beam weapons