### 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
EditorColorMap::create();
	theme = create_custom_theme();
	DisplayServer::set_early_window_clear_color_override(true, theme->get_color(SNAME("background"), SNAME("Editor")));
	register_exporters();
	EDITOR_DEF("interface/editor/save_on_focus_loss", false);
	EDITOR_DEF("interface/editor/show_update_spinner", false);
	EDITOR_DEF("interface/editor/update_continuously", false);
	EDITOR_DEF("interface/editor/localize_settings", true);
	EDITOR_DEF_RST("interface/scene_tabs/restore_scenes_on_load", true);
	EDITOR_DEF_RST("interface/inspector/default_property_name_style", EditorPropertyNameProcessor::STYLE_CAPITALIZED);
	EditorSettings::get_singleton()->add_property_hint(PropertyInfo(Variant::INT, "interface/inspector/default_property_name_style", PROPERTY_HINT_ENUM, "Raw,Capitalized,Localized"));
	EDITOR_DEF_RST("interface/inspector/default_float_step", 0.001);
	
	
	EditorSettings::get_singleton()->add_property_hint(PropertyInfo(Variant::FLOAT, "interface/inspector/default_float_step", PROPERTY_HINT_RANGE, "0.0000001,1,0.0000001"));
	EDITOR_DEF_RST("interface/inspector/disable_folding", false);
	EDITOR_DEF_RST("interface/inspector/auto_unfold_foreign_scenes", true);
	EDITOR_DEF("interface/inspector/horizontal_vector2_editing", false);
	EDITOR_DEF("interface/inspector/horizontal_vector_types_editing", true);
	EDITOR_DEF("interface/inspector/open_resources_in_current_inspector", true);
	PackedStringArray open_in_new_inspector_defaults;
	
	open_in_new_inspector_defaults.push_back("Script");
	
	open_in_new_inspector_defaults.push_back("MeshLibrary");
	EDITOR_DEF("interface/inspector/resources_to_open_in_new_inspector", open_in_new_inspector_defaults);
	EDITOR_DEF("interface/inspector/default_color_picker_mode", 0);
	EditorSettings::get_singleton()->add_property_hint(PropertyInfo(Variant::INT, "interface/inspector/default_color_picker_mode", PROPERTY_HINT_ENUM, "RGB,HSV,RAW,OKHSL", PROPERTY_USAGE_DEFAULT));
	EDITOR_DEF("interface/inspector/default_color_picker_shape", (int32_t)ColorPicker::SHAPE_OKHSL_CIRCLE);