[orca-list] Thunderbird : Orca doesn't announce properly bulleted list

[Alex ARNAUD <alexarnaud hypra fr>]

Dear all,

Environment:
- Debian Sid updated
- Thunderbird 52.4
- Orca master

When I'm writing an HTML mail and read the bulleted list Orca has 
difficulties to read elements and stays silent in some context.

Steps to reproduce:
1) Open Thunderbird (GTK3 here)
2) Write a new mail (here in a new window)
3) Tab until to switch to the message body
4) Create a bulleted list with the Format menu, list, bulleted
5) Write a line and press return to add a new item to the list
6) Write a second line
7) Move between the two lines with up/down

Result: Orca stays silent most of the time
Expected result: Orca should announce the line when the caret moves on

Best regards.
--
Alex ARNAUD
Visual-Impairment Project Manager
Hypra - "Humanizing technology"