### 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
const Point2 mp = get_local_mouse_pos();
	const int xmargin_end = get_size().width - theme_cache.style_normal->get_margin(SIDE_RIGHT);
	const bool hovering_sidebar = mp.x > xmargin_end - minimap_width && mp.x < xmargin_end;
	if (!hovering_sidebar) {
		if (hovering_minimap) {
			
			hovering_minimap = false;
			queue_redraw();
		}
		
		return;
	}
	const int row = get_minimap_line_at_pos(mp);
	const bool new_hovering_minimap = row >= get_first_visible_line() && row <= get_last_full_visible_line();
	if (new_hovering_minimap != hovering_minimap) {
		
		hovering_minimap = new_hovering_minimap;
		queue_redraw();
	}
}
void TextEdit::_update_minimap_click() {