### 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
ERR_FAIL_COND(plugin_init_callback_count == MAX_INIT_CALLBACKS);
	plugin_init_callbacks[plugin_init_callback_count++] = p_callback;
}
EditorPluginInitializeCallback EditorNode::plugin_init_callbacks[EditorNode::MAX_INIT_CALLBACKS];
int EditorNode::build_callback_count = 0;
void EditorNode::add_build_callback(EditorBuildCallback p_callback) {
	ERR_FAIL_COND(build_callback_count == MAX_INIT_CALLBACKS);
	build_callbacks[build_callback_count++] = p_callback;
}
EditorBuildCallback EditorNode::build_callbacks[EditorNode::MAX_BUILD_CALLBACKS];
bool EditorNode::call_build() {
	bool builds_successful = true;
	for (int i = 0; i < build_callback_count && builds_successful; i++) {
		if (!build_callbacks[i]()) {
			ERR_PRINT("A Godot Engine build callback failed.");
			builds_successful = false;
		}
	}
	if (builds_successful && !editor_data.call_build()) {
		ERR_PRINT("An EditorPlugin build callback failed.");
		builds_successful = false;
	}
	return builds_successful;
}
void EditorNode::_inherit_imported(const String &p_action) {