### 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
for (int i = 0; i < bottom_panel_items.size(); i++) {
		if (bottom_panel_items[i].control == p_item) {
			if (p_item->is_visible_in_tree()) {
				_bottom_panel_switch(false, i);
			}
			bottom_panel_vb->remove_child(bottom_panel_items[i].control);
			bottom_panel_hb_editors->remove_child(bottom_panel_items[i].button);
			memdelete(bottom_panel_items[i].button);
			bottom_panel_items.remove_at(i);
			break;
		}
	}
	for (int i = 0; i < bottom_panel_items.size(); i++) {
		bottom_panel_items[i].button->disconnect("toggled", callable_mp(this, &EditorNode::_bottom_panel_switch));
		bottom_panel_items[i].button->connect("toggled", callable_mp(this, &EditorNode::_bottom_panel_switch).bind(i));
	}
}
void EditorNode::_bottom_panel_switch(bool p_enable, int p_idx) {
	ERR_FAIL_INDEX(p_idx, bottom_panel_items.size());
	if (bottom_panel_items[p_idx].control->is_visible() == p_enable) {
		return;
	}