### 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)

tag_stack.push_front(tag);
		} else if (tag == "lb") {
			add_text("[");
			pos = brk_end + 1;
		} else if (tag == "rb") {
			add_text("]");
			pos = brk_end + 1;
		} else if (tag == "lrm") {
			add_text(String::chr(0x200E));
			pos = brk_end + 1;
		} else if (tag == "rlm") {
			add_text(String::chr(0x200F));
			pos = brk_end + 1;
		} else if (tag == "lre") {
			add_text(String::chr(0x202A));
			pos = brk_end + 1;
		} else if (tag == "rle") {
			add_text(String::chr(0x202B));
			pos = brk_end + 1;
		} else if (tag == "lro") {
			add_text(String::chr(0x202D));
			pos = brk_end + 1;
		} else if (tag == "rlo") {
			add_text(String::chr(0x202E));
			pos = brk_end + 1;
		} else if (tag == "pdf") {
			add_text(String::chr(0x202C));
			pos = brk_end + 1;
		} else if (tag == "alm") {
			add_text(String::chr(0x061c));