Added new Suspend then Hibernate option

Summary:
See [[ https://bugs.kde.org/show_bug.cgi?id=399727 | bug 399727 ]] for a good description of what this code is for.

The new ui will show a new option like the following image {F6349860}

FEATURE: 399727

Reviewers: broulik, ngraham, meven, davidedmundson, sitter

Reviewed By: ngraham, meven, davidedmundson, sitter

Subscribers: sitter, davidedmundson, ericadams, jobauer, reverendhomer, meven, soriano, abalaji, graesslin, ngraham, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D16425