[Bug 43611] update-notifier displays a non-closable pop-up over other app in fullscreen mode

[Jiri Bajer]

Public bug reported:

I start a terminal, type apt-get update && apt-get dist-upgrade, start
the game "Battle for Wesnoth" (package wesnoth from Universe) in
fullscreen mode and wait till the package info gets updated.

Since update-notifier runs on background a yellow pop-up appears
notifying me there are new updates but I cannot click on the "X" sign to
close it and have to wait till it disappears after some time.

Either this "X" sign should be clickable or the pop-up shouldn't appear
if Wesnoth (or any other app/game?) is running in fullscreen mode.

** Affects: notification-daemon (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

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update-notifier displays a non-closable pop-up over other app in fullscreen mode
https://launchpad.net/bugs/43611