D10921: auto hide popup when it opened itself

[Marco Martin]

mart added a reviewer: broulik.

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D10921

To: mart, #plasma, broulik
Cc: plasma-devel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, 
sebas, apol, mart