### 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)

st_parser_type = TextServer::STRUCTURED_TEXT_DEFAULT;
						} else if (subtag_a[1] == "u" || subtag_a[1] == "uri") {
							st_parser_type = TextServer::STRUCTURED_TEXT_URI;
						} else if (subtag_a[1] == "f" || subtag_a[1] == "file") {
							st_parser_type = TextServer::STRUCTURED_TEXT_FILE;
						} else if (subtag_a[1] == "e" || subtag_a[1] == "email") {
							st_parser_type = TextServer::STRUCTURED_TEXT_EMAIL;
						} else if (subtag_a[1] == "l" || subtag_a[1] == "list") {
							st_parser_type = TextServer::STRUCTURED_TEXT_LIST;
						} else if (subtag_a[1] == "n" || subtag_a[1] == "gdscript") {
							st_parser_type = TextServer::STRUCTURED_TEXT_GDSCRIPT;
						} else if (subtag_a[1] == "c" || subtag_a[1] == "custom") {
							st_parser_type = TextServer::STRUCTURED_TEXT_CUSTOM;
						}
					}
				}
			}
			push_paragraph(alignment, dir, lang, st_parser_type, jst_flags, tab_stops);
			pos = brk_end + 1;
			tag_stack.push_front("p");
		} else if (tag == "url") {
			int end = p_bbcode.find("[", brk_end);
			if (end == -1) {
				end = p_bbcode.length();
			}
			String url = p_bbcode.substr(brk_end + 1, end - brk_end - 1).unquote();
			push_meta(url);
			pos = brk_end + 1;
			tag_stack.push_front(tag);
		} else if (tag.begins_with("url=")) {