- Fixed createFilesystem boot code function
  * make sure btrfs creation uses -f option to force creation
    of filesystem even if another fs exists
- Fixed error handling in recovery mode
  * the progress information is shown by the continous output
    of a sub process of the calling shell. The sub-process has
    no access to the controlling terminal thus calling system
    exceptions there cause a hangup of the process at that
    stage. This patch fixes it by not calling exceptions and
    handling the result exit code of the sub-process outside
- Fixed install of grub2 in bios_grub mode
  * Use grub2-install with correct options instead of
    raw calling grub2-bios-setup