workaround X11 hanging (mga#12280)

Since commit 95b9cd06f14a9817090584d72830df870c591acc, we run a gtk
main loop after displaying a notification, else actions when clickong
notification buttons are ignored by gtk+/libnotify

However, if the notification is not manually closed, we never exit
this main loop.

In that case, gtk+ fails with:
(mgaapplet:9060): Gtk-CRITICAL **: gtk_window_set_accept_focus: assertion 'GTK_IS_WINDOW (window)' failed

from:
    data=<optimized out>, destroy=0x0, button=3, activate_time=5407876) at gtkmenu.c:1613

And X11 is stuck.

As a workaround, since libnotify offers no way to be notified when
notification is automatically closed, just add a timeout for exiting
the main loop.

At worse, X11 will be stuch only 5 seconds.

1 files changed, 3 insertions, 1 deletions

diff --git a/mgaapplet b/mgaapplet
index 8f928d10..44240e6a 100755
--- a/mgaapplet
+++ b/mgaapplet
@@ -690,7 +690,9 @@ sub setState {
         }
 
         $bubble->set_urgency($state{$state}{urgency}) if $state{$state}{urgency};
-        $bubble->set_timeout(5000);
+        my $timeout = 5000;
+        $bubble->set_timeout($timeout);
+        Glib::Timeout->add($timeout, sub { Gtk3->main_quit; 0 });
         eval { $bubble->show; Gtk3->main };
         warn ">> ERR:$@" if $@;
     }