### 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
file->add_filter("*." + extensions[i], extensions[i].to_upper());
			}
			Node *scene = editor_data.get_edited_scene_root();
			if (scene) {
				file->set_current_path(scene->get_scene_file_path());
			};
			file->set_title(TTR("Pick a Main Scene"));
			file->popup_file_dialog();
		} break;
		case HELP_SEARCH: {
			emit_signal(SNAME("request_help_search"), "");
		} break;
		case HELP_COMMAND_PALETTE: {
			command_palette->open_popup();
		} break;
		case HELP_DOCS: {
			OS::get_singleton()->shell_open(VERSION_DOCS_URL "/");
		} break;
		case HELP_QA: {
			OS::get_singleton()->shell_open("https:godotengine.org/qa/");
		} break;
		case HELP_REPORT_A_BUG: {
			OS::get_singleton()->shell_open("https:github.com/godotengine/godot/issues");
		} break;
		case HELP_SUGGEST_A_FEATURE: {
			OS::get_singleton()->shell_open("https:github.com/godotengine/godot-proposals#readme");
		} break;
		case HELP_SEND_DOCS_FEEDBACK: {
			OS::get_singleton()->shell_open("https:github.com/godotengine/godot-docs/issues");
		} break;