Hide roster when no sortie choices

scripts/core/battle_state.gd

@@ -1556,6 +1556,21 @@ func has_deployment_roster() -> bool:
 	)
 
 
+func has_deployment_roster_choices() -> bool:
+	if not has_deployment_roster():
+		return false
+	var deployed_count := get_deployed_player_count()
+	var max_units := get_deployment_max_units()
+	for unit in get_player_units(true):
+		if bool(unit.get("required_deployment", false)):
+			continue
+		if bool(unit.get("deployed", true)):
+			return true
+		if deployed_count < max_units:
+			return true
+	return false
+
+
 func get_deployed_player_count() -> int:
 	return get_player_units(false).size()