Port lots of things that had to wait on alerts

Adds a HUD for observers
Adds a HUD for rigs and mechs
Adds up/down buttons for AI hud
Add more tg style alerts
Fix some bugs with the tg alerts
Improve icon_states usage by caching it
Redo how respawning works, add a button to ghost hud for it

code/game/objects/structures/window.dm

@@ -47,6 +47,9 @@
 		else
 			. += "<span class='notice'>There is a thick layer of silicate covering it.</span>"
 
+/obj/structure/window/examine_icon()
+	return icon(icon=initial(icon),icon_state=initial(icon_state))
+
 /obj/structure/window/take_damage(var/damage = 0,  var/sound_effect = 1)
 	var/initialhealth = health