### 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
case HELP_COMMUNITY: {
			OS::get_singleton()->shell_open("https:godotengine.org/community");
		} break;
		case HELP_ABOUT: {
			about->popup_centered(Size2(780, 500) * EDSCALE);
		} break;
		case HELP_SUPPORT_GODOT_DEVELOPMENT: {
			OS::get_singleton()->shell_open("https:godotengine.org/donate");
		} break;
		case SET_RENDERER_NAME_SAVE_AND_RESTART: {
			ProjectSettings::get_singleton()->set("rendering/renderer/rendering_method", renderer_request);
			ProjectSettings::get_singleton()->save();
			save_all_scenes();
			restart_editor();
		} break;
	}
}
String EditorNode::adjust_scene_name_casing(const String &root_name) {
	switch (GLOBAL_GET("editor/naming/scene_name_casing").operator int()) {
		case SCENE_NAME_CASING_AUTO:
			
			break;
		case SCENE_NAME_CASING_PASCAL_CASE:
			return root_name.to_pascal_case();
		case SCENE_NAME_CASING_SNAKE_CASE:
			return root_name.replace("-", "_").to_snake_case();
	}
	return root_name;
}
void EditorNode::_request_screenshot() {