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

[TrickyRicky]

trickyricky26 edited the summary of this revision.

REPOSITORY
  R266 Breeze Icons

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

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