### 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
Point2 mp = get_local_mouse_pos();
	int xmargin_end = get_size().width - theme_cache.style_normal->get_margin(SIDE_RIGHT);
	if (!dragging_minimap && (mp.x < xmargin_end - minimap_width || mp.y > xmargin_end)) {
		minimap_clicked = false;
		return;
	}
	minimap_clicked = true;
	dragging_minimap = true;
	int row = get_minimap_line_at_pos(mp);
	if (row >= get_first_visible_line() && (row < get_last_full_visible_line() || row >= (text.size() - 1))) {
		minimap_scroll_ratio = v_scroll->get_as_ratio();
		minimap_scroll_click_pos = mp.y;
		can_drag_minimap = true;
		return;
	}
	Point2i next_line = get_next_visible_line_index_offset_from(row, 0, -get_visible_line_count() / 2);
	int first_line = row - next_line.x + 1;
	double delta = get_scroll_pos_for_line(first_line, next_line.y) - get_v_scroll();
	if (delta < 0) {
		_scroll_up(-delta);
	} else {
		_scroll_down(delta);
	}
}
void TextEdit::_update_minimap_drag() {