### 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
wrap_index = get_line_wrap_count(MIN(i, text.size() - 1)) - MAX(0, num_visible - p_visible_amount);
		
		
		
		int line = (p_line_from + num_total) - 1;
		if (_is_line_hidden(line)) {
			Point2i backtrack = get_next_visible_line_index_offset_from(line, 0, -1);
			num_total = num_total - (backtrack.x - 1);
			wrap_index = backtrack.y;
		}
	} else {
		p_visible_amount = ABS(p_visible_amount);
		int i;
		num_visible -= get_line_wrap_count(p_line_from) - p_wrap_index_from;
		for (i = p_line_from; i >= 0; i--) {
			num_total++;
			if (!_is_line_hidden(i)) {
				num_visible++;
				num_visible += get_line_wrap_count(i);
			}
			if (num_visible >= p_visible_amount) {
				break;
			}
		}
		wrap_index = MAX(0, num_visible - p_visible_amount);
	}
	wrap_index = MAX(wrap_index, 0);
	return Point2i(num_total, wrap_index);
}
void TextEdit::handle_unicode_input(const uint32_t p_unicode, int p_caret) {