notification area can't be added to another screen if already in one screen

Submitted by gb2..@..il.com

Assigned to Nick Schermer

Link to original bug (#9838)

Description

I have dual monitor with separate screen/display (:0.0 and :0.1), but notification area can't be added to the second screen when it's already in the first screen: it's grayed out in panel add item list, even if I run the panel add dialog from second screen:

xfce4-panel --display=:0.1 -a 3 # 3 is the panel on second screen

File /usr/share/xfce4/panel/plugins/systray.desktop clearly includes

X-XFCE-Unique=SCREEN

which should allow it to be added to another screen, right?

I can help to debug this (having recompiled panel).

Version: 4.10.0