D19904: Prompt user to save/discard changes upon closing config dialog

[Amish Naidu]

amhndu edited the summary of this revision.

REPOSITORY
  R318 Dolphin

REVISION DETAIL
  https://phabricator.kde.org/D19904

To: amhndu, #dolphin
Cc: kfm-devel, alexde, feverfew, spoorun, navarromorales, firef, andrebarros, emmanuelp, mikesomov
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