Switch respawn & self-revive keys to custom keybinds

[jaj22]

What type of PR is this.

1. Bug
2. Change
3. Enhancement

What have you changed and why?

Antistasi medical respawn (R) and self-revive (H) keys were hard-coded. Now they're not. Also cleaned up some questionable logic that might have caused weird effects if people hit these keys too early.

Please specify which Issue this PR Resolves.

closes #3232

Please verify the following and ensure all checks are completed.

1. Have you loaded the mission in LAN host?
2. Have you loaded the mission on a dedicated server?

Is further testing or are further changes required?

1. No
2. Yes (Please provide further detail below.)

How can the changes be tested?

Start Antistasi without ACE medical and self-revive enabled in parameters. Get yourself killed, for example by using this:
player setPosATL (getPosATL player vectorAdd [0,0,50]);

Try changing the keybinds in the controls menu.

[CalebSerafin]

Okay, the logic looks solid and the stringtable change is good.

It would be nice if we could get rid of the dance for adding and removing event handlers and make it a one-time init. Then the event handlers can do a safety check in their handlers to ensure that the player is indeed unconscious.
But that is beyond the control of fn_unconscious.sqf so the improvement now is okay.

[jaj22]

Okay, the logic looks solid and the stringtable change is good.

It would be nice if we could get rid of the dance for adding and removing event handlers and make it a one-time init. Then the event handlers can do a safety check in their handlers to ensure that the player is indeed unconscious. But that is beyond the control of fn_unconscious.sqf so the improvement now is okay.

I actually wrote it that way initially, but the incapacitated var isn't enough because it needs to reach that part of the unconscious function before the actions are valid, and incapacitated is set earlier. Could add another flag var, but I decided that I preferred the EH dance.