### 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
return int(unbind_count->get_value());
}
Vector<Variant> ConnectDialog::get_binds() const {
	return cdbinds->params;
}
String ConnectDialog::get_signature(const MethodInfo &p_method, PackedStringArray *r_arg_names) {
	PackedStringArray signature;
	signature.append(p_method.name);
	signature.append("(");
	for (int i = 0; i < p_method.arguments.size(); i++) {
		if (i > 0) {
			signature.append(", ");
		}
		const PropertyInfo &pi = p_method.arguments[i];
		String tname = "var";
		if (pi.type == Variant::OBJECT && pi.class_name != StringName()) {
			tname = pi.class_name.operator String();
		} else if (pi.type != Variant::NIL) {
			tname = Variant::get_type_name(pi.type);
		}
		signature.append((pi.name.is_empty() ? String("arg " + itos(i)) : pi.name) + ": " + tname);
		if (r_arg_names) {
			r_arg_names->push_back(pi.name + ":" + tname);
		}
	}
	signature.append(")");
	return String().join(signature);
}
bool ConnectDialog::get_deferred() const {