Some icons (eg. skype or vlc) disappears from traytop after some gnome-shell dialogs (like logout or shutdown)

[Baltix]

Hi polof, thanks for useful gnome-shell extension :)

There is a strange bug in traytop - some icons (eg. skype or vlc) disappears from traytop after some gnome-shell dialogs (like shutdown, logout and some other) are displayed.

Steps to reproduce:

1. Activate traytop extension and then start skype - skype icon appears in top right, near the user menu.
2. Choose Logout or Shutdown from User menu (from top panel) and then press "Cancel"

Actual resuts:
Skype icon disappears when Shutdown or Logout confirmation dialog is displayed - press Cancel in Shutdown/Logout dialog and you will see no skype icon, while skype process is still running.

Expected results:
Skype icon shouldn't disappear when Shutdown, Logout confirmation or other gnome-shell dialogs are displayed. If traytop extension is disabled then skype icon doesn't disappear from notification area at the bottom right.

The same bug was also with other similar extension - gnome-shell-classic-systray , see:
rcmorano/gnome-shell-gnome2-notifications#14

[Baltix]

classic systray extension is slightly improved by linuxdeepin distribution developers, see https://github.com/linuxdeepin/deepin-gnome-shell-extensions/tree/master/classic-systray%40linuxdeepin.com