[MERGED PR] Removes the security alert HUD button

[Ikea]

I'm not a huge fan of this, if you have to open up the pda to use the alert experienced players will just leave the pda open all the time. This mostly nerfs newer players but does nothing for experienced players. It also removes the convivence of sending an alert, meaning stuff like pretyping radio messages/pda messages become as convinent as security alerts, and the former doesn't alert the antagonist nearly as much about the incoming security swarm