D5012: Delay notifications until desktop session has loaded

[Valerio Pilo]

vpilo added reviewers: graesslin, dfaure, davidedmundson, broulik, mck182.

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D5012

To: vpilo, #plasma, #plasma_workspaces, graesslin, dfaure, davidedmundson, 
broulik, mck182
Cc: graesslin, dfaure, davidedmundson, broulik, mck182, plasma-devel, 
progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol