### 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)

}
			if (k->is_action("ui_home", true) && vscroll->is_visible_in_tree()) {
				vscroll->set_value(0);
				handled = true;
			}
			if (k->is_action("ui_end", true) && vscroll->is_visible_in_tree()) {
				vscroll->set_value(vscroll->get_max());
				handled = true;
			}
			if (is_shortcut_keys_enabled()) {
				if (k->is_action("ui_text_select_all", true)) {
					select_all();
					handled = true;
				}
				if (k->is_action("ui_copy", true)) {
					selection_copy();
					handled = true;
				}
			}
			if (k->is_action("ui_menu", true)) {
				if (context_menu_enabled) {
					_update_context_menu();
					menu->set_position(get_screen_position());
					menu->reset_size();
					menu->popup();
					menu->grab_focus();
				}
				handled = true;
			}
			if (handled) {