D10795: [grouping applet] Use "object-group" as icon

[Kai Uwe Broulik]

broulik accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R114 Plasma Addons

BRANCH
  changeGroupingIcon

REVISION DETAIL
  https://phabricator.kde.org/D10795

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