- Suppress all the space of time got in get_img_create_time because it might be used in dialog prompt.
- Bug fixed: two extra grub 2.02 modules gfxterm_background and gfxterm_menu are added now when creating bootx64.efi and bootxia32.efi by ocs-gen-grub2-efi-bldr. Otherwise the backgroud won't be shown.