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

[Roman Gilg]

subdiff added a dependency: D7768: [Task Manager] On containsMouse change 
always reset toolTipDelegate data.

REPOSITORY
  R119 Plasma Desktop

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

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