### 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
tab_preview_panel->hide();
}
void EditorNode::_scene_tab_input(const Ref<InputEvent> &p_input) {
	Ref<InputEventMouseButton> mb = p_input;
	if (mb.is_valid()) {
		if (scene_tabs->get_hovered_tab() >= 0) {
			if (mb->get_button_index() == MouseButton::MIDDLE && mb->is_pressed()) {
				_scene_tab_closed(scene_tabs->get_hovered_tab());
			}
		} else {
			if (mb->get_button_index() == MouseButton::LEFT && mb->is_double_click()) {
				_menu_option_confirm(FILE_NEW_SCENE, true);
			}
		}
		if (mb->get_button_index() == MouseButton::RIGHT && mb->is_pressed()) {
			
			scene_tabs_context_menu->clear();
			scene_tabs_context_menu->reset_size();
			scene_tabs_context_menu->add_shortcut(ED_GET_SHORTCUT("editor/new_scene"), FILE_NEW_SCENE);
			if (scene_tabs->get_hovered_tab() >= 0) {
				scene_tabs_context_menu->add_shortcut(ED_GET_SHORTCUT("editor/save_scene"), FILE_SAVE_SCENE);
				scene_tabs_context_menu->add_shortcut(ED_GET_SHORTCUT("editor/save_scene_as"), FILE_SAVE_AS_SCENE);
			}
			scene_tabs_context_menu->add_shortcut(ED_GET_SHORTCUT("editor/save_all_scenes"), FILE_SAVE_ALL_SCENES);
			if (scene_tabs->get_hovered_tab() >= 0) {
				scene_tabs_context_menu->add_separator();
				scene_tabs_context_menu->add_item(TTR("Show in FileSystem"), FILE_SHOW_IN_FILESYSTEM);