[orca-list] "Orca" and "firefox": "alt" key again

[Max <heavy9922 gmail com>]

Hi Joanye, all.

Steps to reproduce:

1. Open the "firefox" any website on which there are lists;

2. Set the focus on the list;

3. Press the "alt" key and the down arrow.

"Orca" open list; However, at the same time - and open menu "firefox".