[Differential] [Accepted] D3320: Avoid connecting to screen changed signals twice

[apol (Aleix Pol Gonzalez)]

apol accepted this revision.
apol added a reviewer: apol.
This revision is now accepted and ready to land.

REPOSITORY
  rPLASMAWORKSPACE Plasma Workspace

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D3320

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: davidedmundson, #plasma, apol
Cc: plasma-devel, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas
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