D7260: System tray icon's context menu isn't updated properly in plasma/x11

[Aleksei Nikiforov]

i.Dark_Templar added reviewers: Plasma, davidedmundson.

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D7260

To: i.Dark_Templar, #plasma, davidedmundson
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, 
abetts, sebas, apol, mart, lukas