### 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
if (const EditorData::CustomType *ctype = EditorNode::get_editor_data().get_custom_type_by_name(p_class)) {
		return ctype->icon;
	}
	if (gui_base->has_theme_icon(p_class, SNAME("EditorIcons"))) {
		return gui_base->get_theme_icon(p_class, SNAME("EditorIcons"));
	}
	if (p_fallback.length() && gui_base->has_theme_icon(p_fallback, SNAME("EditorIcons"))) {
		return gui_base->get_theme_icon(p_fallback, SNAME("EditorIcons"));
	}
	return nullptr;
}
bool EditorNode::is_object_of_custom_type(const Object *p_object, const StringName &p_class) {
	ERR_FAIL_COND_V(!p_object, false);
	Ref<Script> scr = p_object->get_script();
	if (scr.is_null() && Object::cast_to<Script>(p_object)) {
		scr = p_object;
	}
	if (scr.is_valid()) {
		Ref<Script> base_script = scr;
		while (base_script.is_valid()) {
			StringName name = EditorNode::get_editor_data().script_class_get_name(base_script->get_path());
			if (name == p_class) {
				return true;
			}
			base_script = base_script->get_base_script();
		}
	}
	return false;
}
void EditorNode::progress_add_task(const String &p_task, const String &p_label, int p_steps, bool p_can_cancel) {