D7769: [Task Manager] Use Grid for grouped and single tooltips

[Eike Hein]

hein accepted this revision.

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D7769

To: subdiff, #plasma, davidedmundson, hein
Cc: davidedmundson, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, 
jensreuterberg, abetts, sebas, apol, mart