D27221: Make PC3 ToolButton use SmallMedium icon size by default, to match other versions

[Nathaniel Graham]

ngraham added a dependent revision: D27222: [applets/taskmanager] increase size 
of tooltip playback ToolButton sizes, per VDG mockup.

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D27221

To: ngraham, #vdg, #plasma, broulik
Cc: kde-frameworks-devel, LeGast00n, cblack, GB_2, michaelh, ngraham, bruns