Fix NavigationRegion3D not reacting to runtime debug enabled change

Fixes NavigationRegion3D not reacting when the main debug enabled property got changed as it only looked at the navigation mesh specific debug.

scene/3d/navigation_region_3d.cpp

@@ -474,7 +474,7 @@ void NavigationRegion3D::_update_debug_mesh() {
 		return;
 	}
 
-	if (!NavigationServer3D::get_singleton()->get_debug_navigation_enabled()) {
+	if (!NavigationServer3D::get_singleton()->get_debug_enabled() || !NavigationServer3D::get_singleton()->get_debug_navigation_enabled()) {
 		if (debug_instance.is_valid()) {
 			RS::get_singleton()->instance_set_visible(debug_instance, false);
 		}
@@ -640,7 +640,7 @@ void NavigationRegion3D::_update_debug_mesh() {
 
 #ifdef DEBUG_ENABLED
 void NavigationRegion3D::_update_debug_edge_connections_mesh() {
-	if (!NavigationServer3D::get_singleton()->get_debug_navigation_enabled()) {
+	if (!NavigationServer3D::get_singleton()->get_debug_enabled() || !NavigationServer3D::get_singleton()->get_debug_navigation_enabled()) {
 		if (debug_edge_connections_instance.is_valid()) {
 			RS::get_singleton()->instance_set_visible(debug_edge_connections_instance, false);
 		}