D19575: Add collapse-all and expand-all action icons

[Noah Davis]

ndavis requested changes to this revision.
This revision now requires changes to proceed.

REPOSITORY
  R266 Breeze Icons

REVISION DETAIL
  https://phabricator.kde.org/D19575

To: trickyricky26, #vdg, ngraham, ndavis
Cc: ndavis, ngraham, kde-frameworks-devel, michaelh, bruns
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