D29123: Do not mark entry as uninstalled if uninstallation script failed

[Alexander Lohnau]

alex marked 4 inline comments as done.

REPOSITORY
  R304 KNewStuff

BRANCH
  arcpatch-D29123_1

REVISION DETAIL
  https://phabricator.kde.org/D29123

To: alex, #knewstuff, meven, ngraham, leinir
Cc: leinir, kde-frameworks-devel, LeGast00n, cblack, michaelh, ngraham, bruns