* include/DialogManageFlags.h, src/DialogManageFlags.cc, src/Win_GParted.cc: improved behaviour of flagmanagementdialog.
* include/DialogManageFlags.h, include/GParted_Core.h, include/Makefile.am, include/Utils.h, include/Win_GParted.h, src/DialogManageFlags.cc, src/GParted_Core.cc, src/Makefile.am, src/Win_GParted.cc: add 'flag management' (#330453)