D8607: Move power management checkbox to the top

[Nathaniel Graham]

ngraham added reviewers: Plasma: Workspaces, broulik.

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D8607

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