### 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 (length_option) {
				length = length_option->value.to_int();
			}
			push_fade(start_index, length);
			pos = brk_end + 1;
			tag_stack.push_front("fade");
		} else if (bbcode_name == "shake") {
			int strength = 5;
			OptionMap::Iterator strength_option = bbcode_options.find("level");
			if (strength_option) {
				strength = strength_option->value.to_int();
			}
			float rate = 20.0f;
			OptionMap::Iterator rate_option = bbcode_options.find("rate");
			if (rate_option) {
				rate = rate_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_shake(strength, rate, connected);
			pos = brk_end + 1;
			tag_stack.push_front("shake");
			set_process_internal(true);
		} else if (bbcode_name == "wave") {
			float amplitude = 20.0f;
			OptionMap::Iterator amplitude_option = bbcode_options.find("amp");
			if (amplitude_option) {