### Godot version

v4.1.stable.official [970459615]

### System information

Godot v4.1.stable - Windows 10.0.22621 - Vulkan (Forward+) - dedicated NVIDIA GeForce MX330 (NVIDIA; 30.0.15.1169) - 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz (8 Threads)

### Issue description

Calling `RichTextLabel`'s `select_all` method has no visual indicator, but it must have one. 

### Steps to reproduce

- Add `RichTextLabel` node
- Set `selection_enabled` value to be `true`
- Call `$RichTextLabel.select_all() `method in `_ready`

### Minimal reproduction project

[RichTextLabel_bug.zip](https://github.com/godotengine/godot/files/12098913/RichTextLabel_bug.zip)

}
							}
							fc->set_opentype_features(features);
						}
					}
				}
			}
			fc->set_base_font(font);
			if (def_font != CUSTOM_FONT) {
				_push_def_font_var(def_font, fc, fnt_size);
			} else {
				push_font(fc, fnt_size);
			}
			pos = brk_end + 1;
			tag_stack.push_front("font");
		} else if (tag.begins_with("outline_size=")) {
			int fnt_size = tag.substr(13, tag.length()).to_int();
			if (fnt_size > 0) {
				push_outline_size(fnt_size);
			}
			pos = brk_end + 1;
			tag_stack.push_front("outline_size");
		} else if (bbcode_name == "fade") {
			int start_index = 0;
			OptionMap::Iterator start_option = bbcode_options.find("start");
			if (start_option) {
				start_index = start_option->value.to_int();
			}
			int length = 10;
			OptionMap::Iterator length_option = bbcode_options.find("length");