### 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)

amplitude = amplitude_option->value.to_float();
			}
			float period = 5.0f;
			OptionMap::Iterator period_option = bbcode_options.find("freq");
			if (period_option) {
				period = period_option->value.to_float();
			}
			bool connected = true;
			OptionMap::Iterator connected_option = bbcode_options.find("connected");
			if (connected_option) {
				connected = connected_option->value.to_int();
			}
			push_wave(period, amplitude, connected);
			pos = brk_end + 1;
			tag_stack.push_front("wave");
			set_process_internal(true);
		} else if (bbcode_name == "tornado") {
			float radius = 10.0f;
			OptionMap::Iterator radius_option = bbcode_options.find("radius");
			if (radius_option) {
				radius = radius_option->value.to_float();
			}
			float frequency = 1.0f;
			OptionMap::Iterator frequency_option = bbcode_options.find("freq");
			if (frequency_option) {
				frequency = frequency_option->value.to_float();
			}
			bool connected = true;
			OptionMap::Iterator connected_option = bbcode_options.find("connected");
			if (connected_option) {