D7560: Properly show/hide preview dialog

[Luigi Toscano]

ltoscano accepted this revision.
ltoscano added a comment.
This revision is now accepted and ready to land.


  It works as expected. Technically the issue is not a regression, I've just noticed also in the kdelibs4 version. It *may* be fixed there, but up to you.
  It was not reported as bug (btw, would you like to go through the bug list for palapeli to see if it's possible to close something?)

REPOSITORY
  R423 Palapeli

BRANCH
  preview

REVISION DETAIL
  https://phabricator.kde.org/D7560

To: chehrlic, #kde_games, ltoscano
Cc: ltoscano, #kde_games
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