### 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)

continue;
			}
			if (txt.is_empty() && after_list_open_tag) {
				txt = "\n"; 
			}
			after_list_open_tag = false;
			if (tag == "/ol" || tag == "/ul") {
				if (!txt.is_empty()) {
					
					
					if (!txt.ends_with("\n")) {
						txt += "\n";
					}
				} else if (!after_list_close_tag) {
					txt = "\n"; 
				}
				after_list_close_tag = true;
			} else {
				after_list_close_tag = false;
			}
			if (!txt.is_empty()) {
				add_text(txt);
			}
			tag_stack.pop_front();
			pos = brk_end + 1;
			if (tag != "/img" && tag != "/dropcap") {
				pop();
			}
			continue;
		}