### 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
show_warning(TTR("Default editor layout overridden.\nTo restore the Default layout to its base settings, use the Delete Layout option and delete the Default layout."));
			}
		} break;
		case SETTINGS_LAYOUT_DELETE: {
			if (p_file.is_empty()) {
				return;
			}
			Ref<ConfigFile> config;
			config.instantiate();
			Error err = config->load(EditorSettings::get_singleton()->get_editor_layouts_config());
			if (err != OK || !config->has_section(p_file)) {
				show_warning(TTR("Layout name not found!"));
				return;
			}
			
			List<String> keys;
			config->get_section_keys(p_file, &keys);
			for (const String &key : keys) {
				config->set_value(p_file, key, Variant());
			}
			config->save(EditorSettings::get_singleton()->get_editor_layouts_config());
			layout_dialog->hide();
			_update_layouts_menu();
			if (p_file == "Default") {
				show_warning(TTR("Restored the Default layout to its base settings."));
			}
		} break;
		default: {
			
			if (file->get_file_mode() == EditorFileDialog::FILE_MODE_SAVE_FILE) {