Make TGUINanoMap actually somewhat as good as old NanoMap

code/modules/tgui/modules/crew_monitor.dm

@@ -1,5 +1,6 @@
 /datum/tgui_module/crew_monitor
 	name = "Crew monitor"
+	var/mapZoom = 1
 
 /datum/tgui_module/crew_monitor/tgui_act(action, params)
 	if(..())
@@ -18,6 +19,10 @@
 				if(hassensorlevel(H, SUIT_SENSOR_TRACKING))
 					AI.ai_actual_track(H)
 			return TRUE
+		if("changeZoom")
+			var/newZoom = params["newZoom"]
+			mapZoom = newZoom
+			return TRUE
 
 
 /datum/tgui_module/crew_monitor/tgui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = 0, datum/tgui/master_ui = null, datum/tgui_state/state = GLOB.tgui_default_state)
@@ -51,4 +56,8 @@
 	for(var/zlevel in map_levels)
 		data["crewmembers"] += crew_repository.health_data(zlevel)
 
+	data["zoomLevels"] = list(1, 1.25, 1.5, 1.75, 2)
+
+	data["mapZoom"] = mapZoom
+
 	return data