### 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
Size2 size = theme_cache.style_normal->get_minimum_size();
	if (fit_content_height) {
		size.y += content_height_cache;
	}
	return size;
}
bool TextEdit::is_text_field() const {
	return true;
}
Variant TextEdit::get_drag_data(const Point2 &p_point) {
	Variant ret = Control::get_drag_data(p_point);
	if (ret != Variant()) {
		return ret;
	}
	if (has_selection() && selection_drag_attempt) {
		String t = get_selected_text();
		Label *l = memnew(Label);
		l->set_text(t);
		set_drag_preview(l);
		return t;
	}
	return Variant();
}
bool TextEdit::can_drop_data(const Point2 &p_point, const Variant &p_data) const {