### Godot version

v4.1.1.stable.official [bd6af8e0e]

### System information

v4.1.1.stable.official [bd6af8e0e]

### Issue description

In-script documentation (`##`) for `signal` members is not appearing in the _Node_ tab as expected.  Other documentation appears to work correctly in the _Inspector_ tab.

Working example (exported variable):
![GodotDocumentationWorking](https://github.com/godotengine/godot/assets/13528480/ab9b19d4-c9f7-4658-8379-f2c2699310b8)

Non-working example (`signal`)
![GodotDocumentationNotWorking](https://github.com/godotengine/godot/assets/13528480/06824f6a-b135-4454-a06e-7c6feb34060b)

I have tried deselecting and reselecting the associated Node, changing between the tabs on the left pane, changing active scripts and even restarting Godot - nothing makes it work.  According to the [GScript Documentation on Documentation Comments](https://docs.godotengine.org/en/stable/tutorials/scripting/gdscript/gdscript_documentation_comments.html), this **should** work, right?  Or is there something completely obvious that I am missing?


### Steps to reproduce

1. In Godot, create a new Node of type `Node`
2. Attach a new script to this Node, accepting all current defaults
3. In the script editor create a `signal` called `Foo` and right above it, create a `##` comment for it
4. Also create an `@export`ed integer variable called `Bar` and also create a `##` comment for it
5. Unselect and reselect the Node in the _Scene_ tab to refresh the _Inspector_ and _Node_ tabs
6. Hover over the variable in the _Inspector_ tab and see that the added description is shown correctly
7. Hover over the signal in the _Node_ tab and see that the added description is **not** shown and "_No description._" is shown instead

This is an example of the script that could be added:
```
## This is signal foo!
signal Foo

## This is exported signal bar!
@export var Bar : int = 0
```

### Minimal reproduction project

N/A
continue;
		}
		type_list->add_item(Variant::get_type_name(Variant::Type(i)), i);
	}
	bind_controls.push_back(type_list);
	Button *add_bind = memnew(Button);
	add_bind->set_text(TTR("Add"));
	add_bind_hb->add_child(add_bind);
	add_bind->connect("pressed", callable_mp(this, &ConnectDialog::_add_bind));
	bind_controls.push_back(add_bind);
	Button *del_bind = memnew(Button);
	del_bind->set_text(TTR("Remove"));
	add_bind_hb->add_child(del_bind);
	del_bind->connect("pressed", callable_mp(this, &ConnectDialog::_remove_bind));
	bind_controls.push_back(del_bind);
	vbc_right->add_margin_child(TTR("Add Extra Call Argument:"), add_bind_hb);
	bind_editor = memnew(EditorInspector);
	bind_controls.push_back(bind_editor);
	vbc_right->add_margin_child(TTR("Extra Call Arguments:"), bind_editor, true);
	unbind_count = memnew(SpinBox);
	unbind_count->set_tooltip_text(TTR("Allows to drop arguments sent by signal emitter."));
	unbind_count->connect("value_changed", callable_mp(this, &ConnectDialog::_unbind_count_changed));
	vbc_right->add_margin_child(TTR("Unbind Signal Arguments:"), unbind_count);
	HBoxContainer *hbc_method = memnew(HBoxContainer);
	vbc_left->add_margin_child(TTR("Receiver Method:"), hbc_method);
	dst_method = memnew(LineEdit);
	dst_method->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	dst_method->connect("text_changed", callable_mp(method_tree, &Tree::deselect_all).unbind(1));
	dst_method->connect("text_submitted", callable_mp(this, &ConnectDialog::_text_submitted));