### Godot version

4.1

### System information

Windows

### Issue description

Being able to have multiple cursors similarly to vscode is a great feature, however it's only possible to add carets, not remove them. By left clicking you can remove all extra cursors but you cannot remove a specific one so after selecting multiple lines a single missclick, you have to reselect them all again. Looking at the original pr there was a remove_caret function added so it would make sense to be able to remove carets when clicking again, like in vscode.

![image](https://github.com/godotengine/godot/assets/19669673/3867c00e-9faa-4429-9c6d-f2d6d3883044)


### Steps to reproduce

- Alt click to add multiple carets
- Alt click on the same position again
- Nothing happens

### Minimal reproduction project

N/A
Vector<float> tabs;
		tabs.push_back(font->get_char_size(' ', font_size).width * tab_size);
		text.write[p_line].data_buf->tab_align(tabs);
	}
	
	const int old_height = text.write[p_line].height;
	const int wrap_amount = get_line_wrap_amount(p_line);
	int height = font_height;
	for (int i = 0; i <= wrap_amount; i++) {
		height = MAX(height, text[p_line].data_buf->get_line_size(i).y);
	}
	text.write[p_line].height = height;
	
	if (old_height == line_height && height < line_height) {
		_calculate_line_height();
	} else {
		line_height = MAX(height, line_height);
	}
	
	const int old_width = text.write[p_line].width;
	int line_width = get_line_width(p_line);
	text.write[p_line].width = line_width;
	
	if (old_width == max_width && line_width < max_width) {
		_calculate_max_line_width();
	} else if (!is_hidden(p_line)) {
		max_width = MAX(line_width, max_width);
	}
}
void TextEdit::Text::invalidate_all_lines() {