[orca-list] On pad, when the layout mode is disabled, Orca skips links

[Alex ARNAUD <alexarnaud hypra fr>]

Hello all,

Tested environment:
- Debian 8 "Jessie", Firefox ESR 60 with e10s enabled and Orca 3.24
- Debian 9 "Stretch", Firefox ESR 60 and Firefox Nightly 66 with e10s 
enabled and Orca master

Steps to reproduce:
1) Open https://pad.lqdn.fr/p/yunohost-17-04-2018
2) Click on first line to ensure your correctly on the pad edition 
section (maybe it's another Orca issue?)
3) Unchecked the "Enable layout mode"
4) Switch from navigation to focus if needed
5) Move with down arrow until the line beginning with "Previous pad:"
6) Press down arrow

Result:
Orca moves on next line

Expected result:
Orca should move on the link or read the whole line to ensure the user 
will be aware of the link.
I assume the behavior should be the same as it is with Thunderbird when 
there is link when user write a message.

Try the same thing in browse mode:
The behavior is correct

Best regards,
Alex.