[MERGED PR] Removes the security alert HUD button

[Glamurio]

I suspect this will be a divisive change much like when Sec got their accesses changed, but it will ultimately not feel much different. I have often purposefully not pressed the button to avoid deathballing, and if people really want to then the PDA still exists.

However, I do quite like the idea of making it a dedicated item you can buy with credits that assistants get for free. Assistants don't have tools to fend off antagonists, so it just makes sense, and it gives a reason for players to purchase things other than donuts, this seems particularly healthy to consider on classic.