### 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
break;
			}
			editor_run.stop();
			run_custom_filename.clear();
			run_current_filename.clear();
			stop_button->set_disabled(true);
			_reset_play_buttons();
			if (bool(EDITOR_GET("run/output/always_close_output_on_stop"))) {
				for (int i = 0; i < bottom_panel_items.size(); i++) {
					if (bottom_panel_items[i].control == log) {
						_bottom_panel_switch(false, i);
						break;
					}
				}
			}
			EditorDebuggerNode::get_singleton()->stop();
			emit_signal(SNAME("stop_pressed"));
		} break;
		case FILE_SHOW_IN_FILESYSTEM: {
			String path = editor_data.get_scene_path(editor_data.get_edited_scene());
			if (!path.is_empty()) {
				FileSystemDock::get_singleton()->navigate_to_path(path);
			}
		} break;
		case RUN_PLAY_SCENE: {
			if (run_current_filename.is_empty() || editor_run.get_status() == EditorRun::STATUS_STOP) {
				run_play_current();
			} else {
				String last_current_scene = run_current_filename; 
				run_play_custom(last_current_scene);