### 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
hbc_method->add_child(dst_method);
	open_method_tree = memnew(Button);
	hbc_method->add_child(open_method_tree);
	open_method_tree->set_text("Pick");
	open_method_tree->connect("pressed", callable_mp(this, &ConnectDialog::_open_method_popup));
	advanced = memnew(CheckButton(TTR("Advanced")));
	vbc_left->add_child(advanced);
	advanced->set_h_size_flags(Control::SIZE_SHRINK_BEGIN | Control::SIZE_EXPAND);
	advanced->set_pressed(EditorSettings::get_singleton()->get_project_metadata("editor_metadata", "use_advanced_connections", false));
	advanced->connect("pressed", callable_mp(this, &ConnectDialog::_advanced_pressed));
	HBoxContainer *hbox = memnew(HBoxContainer);
	vbc_right->add_child(hbox);
	deferred = memnew(CheckBox);
	deferred->set_h_size_flags(0);
	deferred->set_text(TTR("Deferred"));
	deferred->set_tooltip_text(TTR("Defers the signal, storing it in a queue and only firing it at idle time."));
	hbox->add_child(deferred);
	one_shot = memnew(CheckBox);
	one_shot->set_h_size_flags(0);
	one_shot->set_text(TTR("One Shot"));
	one_shot->set_tooltip_text(TTR("Disconnects the signal after its first emission."));
	hbox->add_child(one_shot);
	cdbinds = memnew(ConnectDialogBinds);
	error = memnew(AcceptDialog);
	add_child(error);
	error->set_title(TTR("Cannot connect signal"));
	error->set_ok_button_text(TTR("Close"));
	set_ok_button_text(TTR("Connect"));
}
ConnectDialog::~ConnectDialog() {