### 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
scrolling = false;
	minimap_clicked = false;
	
	set_v_scroll(get_v_scroll() - 1);
	
	for (int i = 0; i < carets.size(); i++) {
		if (has_selection(i)) {
			continue;
		}
		int last_vis_line = get_last_full_visible_line();
		int last_vis_wrap = get_last_full_visible_line_wrap_index();
		if (get_caret_line(i) > last_vis_line || (get_caret_line(i) == last_vis_line && get_caret_wrap_index(i) > last_vis_wrap)) {
			set_caret_line(last_vis_line, false, false, last_vis_wrap, i);
		}
	}
	merge_overlapping_carets();
}
void TextEdit::_scroll_lines_down() {