### 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
HBoxContainer *status_bar = nullptr;
	Button *toggle_scripts_button = nullptr;
	String base_path;
	Color text_color;
	Color title_color;
	Color headline_color;
	Color comment_color;
	Color symbol_color;
	Color value_color;
	Color qualifier_color;
	Color type_color;
	Ref<Font> doc_font;
	Ref<Font> doc_bold_font;
	Ref<Font> doc_title_font;
	Ref<Font> doc_code_font;
	int doc_title_font_size;
	int scroll_to = -1;
	void _update_theme();
	void _help_callback(const String &p_topic);
	void _add_text(const String &p_bbcode);
	bool scroll_locked = false;
	
	void _add_type(const String &p_type, const String &p_enum = String());
	void _add_type_icon(const String &p_type, int p_size = 0);
	void _add_method(const DocData::MethodDoc &p_method, bool p_overview = true);
	void _add_bulletpoint();
	void _class_desc_finished();
	void _class_list_select(const String &p_select);
	void _class_desc_select(const String &p_select);
	void _class_desc_input(const Ref<InputEvent> &p_input);