FE/Qt: Precompiled header hacking (work in progress).
FE/Qt: Mac OS X: HiDPI: Integrate VirtualBox *about* image.
FE/Qt4: 5395: Crash if 'about' box is open during VM shutdown - should be fixed, VBoxAboutDlg refactoring.
Automated rebranding to Oracle copyright/license strings via filemuncher
FE/Qt4: much more cosmetics
FE/Qt4: Relocating GUI files according new tree-structure.