### Godot version

v4.0.beta15.official [4fa6edc88]

### System information

Windows 11

### Issue description

When drawing a polygon in the editor, several duplicate vertices are added to the polygon array for each click.  In the image below, I clicked three times to draw the triangle, but got 10 entries.  The number you get varies, though I don't know why; I've seen hundreds of points from drawing a hexagon.  I tested it with a Polygon2D, a CollisionPolygon2D, and a CollisionPolygon3D; the issues occurs with all of them.  It later occurred to me that this might happen with a Curve2D as well, and it does.

![image](https://user-images.githubusercontent.com/2808851/214926182-b8609b87-85a1-4a08-8017-be4eeec912c6.png)


### Steps to reproduce

Add a node that has a Polygon or Curve resource, such as a Polygon2D, draw some points, then check the PackedVector2Array resource.

### Minimal reproduction project

N/A
{
						Node2D *node_2d = Object::cast_to<Node2D>(additive_node_entry.node);
						if (node_2d) {
							node_2d->set_transform(additive_node_entry.transform_2d);
						}
						Node3D *node_3d = Object::cast_to<Node3D>(additive_node_entry.node);
						if (node_3d) {
							node_3d->set_transform(additive_node_entry.transform_3d);
						}
					}
				}
				
				if (selected_node_paths.size()) {
					for (NodePath selected_node_path : selected_node_paths) {
						Node *selected_node = instantiated_node->get_node_or_null(selected_node_path);
						if (selected_node) {
							editor_selection->add_node(selected_node);
						}
					}
					editor_selection->update();
				}
				
				for (KeyValue<NodePath, ModificationNodeEntry> &E : modification_table) {
					NodePath new_current_path = E.key;
					Node *modifiable_node = instantiated_node->get_node_or_null(new_current_path);
					if (modifiable_node) {
						
						List<PropertyInfo> pinfo;
						modifiable_node->get_property_list(&pinfo);