### 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
int new_index = editor_data.get_edited_scene();
	int old_index = new_index;
	if (new_index > 0) {
		new_index = new_index - 1;
	} else if (editor_data.get_edited_scene_count() > 1) {
		new_index = 1;
	} else {
		editor_data.add_edited_scene(-1);
		new_index = 1;
	}
	if (p_change_tab) {
		_scene_tab_changed(new_index);
	}
	editor_data.remove_scene(old_index);
	_update_title();
	_update_scene_tabs();
}
void EditorNode::_remove_scene(int index, bool p_change_tab) {
	
	script_icon_cache.clear();
	if (editor_data.get_edited_scene() == index) {
		
		_remove_edited_scene(p_change_tab);
	} else {
		
		editor_data.remove_scene(index);
	}
}
void EditorNode::set_edited_scene(Node *p_scene) {