bitcoin/bitcoin — pull request #2530 by jonasschnelli (2013-04-14 20:16:15+00:00)
Title: fixes #1522: GUI Disappearing (Mac OSX)

- this solution works stable on mac and ensures that the window get's reopened when the user clicks the dock icon .
- tested on 10.8 with Qt4.8.4 and Qt5.0.1