### Godot version

Godot 4.0 RC1 

### System information

MacOS Ventura 13.2

### Issue description

When in the "Text Editor" Help section and trying to change either the:

* Help Font Size
* Help Source Font Size
* Help Title Font Size

Changing the font size has zero effect on the font size.

See below example where "Help Font Size" is 40 however this does not reflect in the godot docs.

<img width="1259" alt="image" src="https://user-images.githubusercontent.com/8476589/218257090-04d14178-a9b7-4c3b-95e4-cb9a99f7f022.png">


### Steps to reproduce

1. Open Editor Settings
2. Click on "Help" within the "Text Editor" section
3. Change the font sizes (Help Font Size, Source Font Size, Title font size)
4. Close the editor settings
5. Observe that changes to the font size had no effect on the font size within the editor godot docs text.

Even restarting Godot has no effect on the font size within Help.

### Minimal reproduction project

N/A
void _class_desc_resized(bool p_force_update_theme);
	int display_margin = 0;
	Error _goto_desc(const String &p_class, int p_vscr = -1);
	
	void _update_method_list(const Vector<DocData::MethodDoc> p_methods);
	void _update_method_descriptions(const DocData::ClassDoc p_classdoc, const Vector<DocData::MethodDoc> p_methods, const String &p_method_type);
	void _update_doc();
	void _request_help(const String &p_string);
	void _search(bool p_search_previous = false);
	String _fix_constant(const String &p_constant) const;
	void _toggle_scripts_pressed();
	static Thread thread;
	static void _wait_for_thread();
	static void _gen_doc_thread(void *p_udata);
protected:
	void _notification(int p_what);
	static void _bind_methods();
public:
	static void generate_doc();
	static DocTools *get_doc_data();
	static void cleanup_doc();
	void go_to_help(const String &p_help);
	void go_to_class(const String &p_class, int p_scroll = 0);
	void update_doc();
	Vector<Pair<String, int>> get_sections();
	void scroll_to_section(int p_section_index);
	void popup_search();
	void search_again(bool p_search_previous = false);
	String get_class();
	void set_focused() { class_desc->grab_focus(); }