D15069: Make thumbnail frame-and-shadow drawing criteria match those of the file dialog

[Nathaniel Graham]

ngraham added a comment.


  Anyone else in #dolphin <https://phabricator.kde.org/tag/dolphin/> wanna weigh in? Since D15071 <https://phabricator.kde.org/D15071> has already landed, all this really does is make Dolphin consistent with the file dialog. It turns out that `hasAlpha()` is pretty smart, and I think this will be a nice UI improvement overall. :)

REPOSITORY
  R318 Dolphin

BRANCH
  arcpatch-D15069

REVISION DETAIL
  https://phabricator.kde.org/D15069

To: ngraham, #dolphin, broulik, elvisangelaccio
Cc: markg, anthonyfieroni, elvisangelaccio, kfm-devel, feverfew, spoorun, navarromorales, firef, andrebarros, emmanuelp
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